plz help me c program

QUESTIONS 1. Write a program to read lab mark from the keyboard with the assumption that only valid value between 0 to 100 is entered (there is no need to validate the input for now). Then, convert the lab mark to be over 15 percent. For example, if the lab mark is 90 then the converted lab score is 13.5%. If the lab score is more than 12.5, display congratulatory remarks on the screen. Otherwise display an encouragement remark. 2. Modify the program written for Question (1) to check the validity of the lab mark entered to be between 0 to 100 only. If invalid data is entered, display appropriate error message on the screen and indicate the end of the program. -BS-Jan2021 1 CSEB2113 Programming 1/ CSNB144 Programming 1 with o 3. Modify the program written for Question (2). In this new program, read lab marks of three students of the CSEB134/CSNB144 course. Convert each lab mark to be over 15 percent. Then, evaluate the scores one by one to determine whether the students received either passing or falling grade of the lab. The passing scores are 9 and above. For each student, print the lab score and the "PASS" or "FAIL" status. 4. Modify the program written for Question (3). In this new program, read mid-term exam mark between 0 to 25 and final exam mark between 0 to 100 (to be converted to be over 60%). Then, calculate the total score of each student. The passing total scores are 40 and above. For each student, print the total score and the "PASS" or "FAIL status by implementing the conditional operator in the program