programming 2 (C++)

answer it CLEARLY please

A student has a name and he/she is in a year of study (level). Each year the student takes a number of courses and score marks for those courses and ends with a GPA for that year. The CGPA for courses of all years is calculated too. The weight of a mark between 0 and 60 is 0 , the weight of a mark between 60 and 70 is 1, the weight of a mark between 70 and 80 is 2, the weight of a mark between 80 and 90 is 3 , and the weight of a mark between 90 and 100 is 4 . Assuming that w stands for the weight of the mark and c stands for the course credit's then the GPA is calculated using the following formula: GPA=ciwtct Define a struct called Year with components numberOfCourses, an array marks[ ], an array credits [] all of type int, and GPA of type float. Define a class called Student with private data members name of type string, level of type int, CGPA of type float, an array study Year [ ] of type Year. The class also has the private member functions calculateGPA(int), and calculateCGPA(). The class has the public member functions ser(int), get GPA (int), get CGPAO, print 0 , a default constructor, and constructor with parameters. Note: Inforce the least privileged principle by using const to prevent member functions from changing