Let Us C solution Chapter 7 Exercise D in Hindi: Write a program to find the grace marks for a student using switch. The user should enter the class obtained by the student and the number of students he has failed in. Use the following logic: - If the student gets first-class and the number of subjects he failed in is greater than 3, then he does not get any grace. If the number of subjects he failed in is less than or equal to 3 then the grace is of 5 marks per subject.