1. Abstract Class Calculate Cumulative Grade Point Average (CGPA) using Abstract Class An abstract class is a class that is declared by the abstract keyword, and it may or may not include abstract methods. Abstract classes cannot be instantiated but can be subclassed. There are three classes: Student, Aided, and SelfFinance. Task: Make the Student class abstract. Declare one abstract method in the Student class - String result(String MarksOfStudent).(This method should be declared as public) Override the abstract method(result(), and implement it in the Aided and SelfFinance classes by extending the abstract Student class. Calculate the CGPA of the student, and return the CGPA in string format (up to two decimal places) for both Aided and SelfFinance classes. Students are categorized as aided and self. Input (MarksOfStudent) differs based on the type of student. Aided Student: There are three sets of marks given for aided students, Subject marks, NCC marks, and Sports marks. The three sets are separated by . Individual Subject marks are separated by comma (",)). Each mark is comprised of the subject marks and credit points, which are separated by space ( ). In NCC marks, there are three sets of strings. The first one indicates if a student is involved in NCC or not (if 0, you need not consider the subject marks and credit points). The second one is subject marks, and the third one is credit points. For Sports marks, follow the same procedure as NCC marks. Self-Finance Student: Everything remains the same as in the case of aided students, except that NCC marks are not awarded. Calculating CGPA: (gradepoint x creditpoint scored) formula for cgpa = creditpoint maximum In the numerator, the credit point is entered. The grade point should be calculated from the Subject, NCC, or Sports marks. In the denominator, the credit point refers to the total of the credit points of all subjects. Calculating Grade Point: Range of Marks 75-100 60-74 50-59 40-49 Below 40 Grade Point 9.0-10.0 8.0-8.9 7.0-7.9 6.0-6.9 0 Calculate the corresponding grade point for the given mark, proportional to the given range. For example, the corresponding grade point for 80 is 9.2" and "53" is "7.3".(take grade point upto 1 decimal place for calculation) Perform all calculations in double type. After calculating the CGPA, return the CGPA in string format (up to two decimal places) in the result function for Aided and SelfFinance class. Note: 100 is the maximum mark, and 5 is the maximum credit point. Aided Student: Sample Input: 100 5,100 5,100 5|1,100,510,100,5 Sample Output: 10.00 Explanation: (gradepoint x creditpoint scored) CGPA= creditpoint maximum STEP 1: Checking the availability of NCC and Sports mark, NCC mark was awarded due to 1 in the first string(1,100,5), sports mark was not awarded due to 0 in the first string(0,100,5) STEP 2: creditpoint maximum = 5+5+5+5= 20 (the total maximum credit points for four subjects including NCC) Note: Grade point should be in one decimal place STEP 3: Calculating the proportional grade point for marks. Student scored 100 in all subjects. Hence the corresponding grade point of 100 is 10.0 STEP 4: (gradepoint x creditpoint scored). (10*5)+(10*5)+(10*5)+(10*5)) = 200 (gradepoint x creditpoint scored) STEP 5: creditpoint maximum = 200/20 = 10.00 (upto two decimal places, use string format function) Self-Finance Student: Sample Input: 100 5,100 5,53 5,76 3|0,100,5 Sample Output: 8.18 Explanation: (gradepoint x creditpoint scored) CGPA= creditpointmaximum STEP 1: Checking the availability of sports mark, sports mark was not awarded due to 0 in the first string(0,100,5) STEP 2: creditpointmaximum 5+5+5+5 = 20 (the total maximum credit points for four subjects ) Note: Grade point should be in one decimal place STEP 3: Calculating the proportional grade point for marks. The corresponding grade point of 100 is 10.0, the corresponding grade point of 53 is 7.3, where there are 9 numbers in 50-59(both inclusive) and 7.0-7.9(both inclusive), 9 /9=1, hence 0.1 increase of grade point(7.0-7.9) is same as the increase of 1 mark(50-59) and the corresponding grade point of 76 is 9.0, where there are 26 numbers in 75-100(both inclusive) and 11 numbers in 9.0-10.0(both inclusive), 26/11=2.36(approximately), hence 0.1 increase of grade point(9.0-10.0) is same as the increase of 2.36 mark(75- 100). Explanation: (gradepoint x creditpoint scored) CGPA= creditpoint maximum STEP 1: Checking the availability of sports mark, sports mark was not awarded due to 0 in the first string(0,100,5) STEP 2: creditpoint maximum 5+5+5+5 = 20 (the total maximum credit points for four subjects ) Note: Grade point should be in one decimal place STEP 3: Calculating the proportional grade point for marks. The corresponding grade point of 100 is 10.0, the corresponding grade point of 53 is 7.3, where there are 9 numbers in 50-59(both inclusive) and 7.0-7.9(both inclusive), 9 /9=1, hence 0.1 increase of grade point(7.0-7.9) is same as the increase of 1 mark(50-59) and the corresponding grade point of 76 is 9.0, where there are 26 numbers in 75-100(both inclusive) and 11 numbers in 9.0-10.0(both inclusive), 26/11=2.36(approximately), hence 0.1 increase of grade point(9.0-10.0) is same as the increase of 2.36 mark(75- 100). STEP 4: = 163.5 (gradepoint x creditpoint scored) = = ((10*5)+(10*5)+(7.3*5)+(9.0*3)) (gradepoint x creditpoint scored) STEP 5: creditpointmaximum = 163.5/20 = 8.18 (upto two decimal places, use string format function)