A waterwheel, that supplies a mill, has a diameter of 40 feet. You start your stop-watch at a point P, which is on the circumference of the waterwheel and on an axis through the center of the waterwheel, is parallel to the surface of the water. The wheel turns counter-clockwise at a constant rate. Two seconds later, point P on the rim of the wheel is at its greatest height. The center of the waterwheel is located 15 feet above the water and 15 feet to the right of the mill which is our designated frame of reference. You are to model the distance d of point P from the surface of the water in terms of the number of seconds t the stopwatch reads. Draw a picture of the situation labeling all important points and find the sinusoidal equation that models this situation and provide a graph.