Knows:
	• Student’s name • Student’s address • Student’s social security  number • Number of credit hours enrolled					• Course’s title • Course’s section • Course’s professor • Course’s time • Course’s room number
		Does(Commands):
	• Add a course to the student’s schedule • Drop a course from the student’s schedule • Calculate student’s fees					• Change room assignment • Add a student to the roll • Print a class roll • Decide if the class is full