A ferris wheel is 45 meters in diameter and boarded from a platform that is at the 3 o'clock position on the ferris wheel. The six o'clock position on the ferris wheel is 4 meters above the ground. The wheel completes 1 full revolution in 6 minutes. The function h = f(t) gives your height in meters above the ground t minutes after the wheel begins to turn. Write an equation for h = f(t).