3. Write a C program using switch to find the grace marks for a student. The user should enter the class obtained by the student and the number of subjects he has failed in. Use the following logic: a. 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. Otherwise the grace is of 5 marks per subject. b. If the student gets second class and the number of subjects he failed in is greater than 2, then he does not get any grace. Otherwise the grace is of 4 marks per subject. c. If the student gets third class and the number of subjects he failed in is greater than 1, then he does not get any grace. Otherwise the grace is of 5 marks per subject