a) Write a simple timetabling program that asks the user to type in the number of students that are expected to be in class not conting the lecturer, assuming that the number typed in is n, display the message that says “A classroom for (n + 1) is available “For example, if the user types 30, display “A classroom for 31 is available” (10 marks) b) Modify the timetabling programme in (a) to display an error message if the number is students is more than 50.