Hi there I need help on this question.

A roller coaster takes 32 seconds to completes a circle that has a radius of 14m and is 2m off the ground. You ride in this coaster for 40 secs (5/4 times).

Find the values of a,b,c and k

y=a+bsin2pi/k(t-c)

t= time (in secs)

I tried doing it theoretically but it didn't come out right when I punched it in the graphing calculator.