Physics question?

[nikesh_kapadia1]

1) If your car has 28.0 inch diameter tires that do not slip on the pavement, how many revolutions per second do these tires make when you are driving at a freeway speed of 65.0 ?
I found w(omega) = 13 and that is correct
2) For the tires in part A, how fast (in ) is each of the following points moving relative to the highway surface: the center of the tire, the top of the tire, and the bottom of the tire?

I cant get part 2 please help