Easy Problem

A=3
B=1
Max=3
Min=-3
Per=2pi
mid points= -pi, pi


Medium

A=3
B=pi
Max=7
Min=1
per=2
mid points= 1, -1

Hard 
A= .20

b=1
Max= -2.80
Min= -3.20
per=2pi
pi is ur mid points


By looking at my examples and knowing how to graph sin and cosine first, you should easily be able to graph these when you make sure all of your pieces are correct!