Help write the code

1......Enter the marks of 5 students in Chemistry, Mathematics and Physics (each out of 100) using a structure named Marks having elements roll no., name, chem_marks, maths_marks and phy_marks and then display the percentage of each student.

2....Write a structure to store the roll no., name, age (between 11 to 14) and address of students (more than 10). Store the information of the students.

1 - Write a function to print the names of all the students having age 14.

2 - Write another function to print the names of all the students having even roll no.3 - Write another function to display the details of the student whose roll no is given (i.e. roll no. entered by the user).

3...Write a structure to store the name, account number and balance of customers (more than 10) and store their information.

1 - Write a function to print the names of all the customers having balance less than $200.

2 - Write a function to add $100 in the balance of all the customers having more than $1000 in their balance and then print the incremented value of their balance.