I really need help with this problem.

4-147. Juan loves to ride his bicycle. Today he is cruising along Exeter Street, which is flat ground, at 20 miles per hour (29.33 feet per second). On his front wheel is reflector 1 1 inches from the center of the wheel. Juan's bike has 26 inch wheels mile radius is 13 inches). Assume that the reflector is farthest from ale ground wher ume t = 0. Let h be the height of the reflector above the ground (In feet), t bem elapsed time (in seconds) and x the distance (in inches) Juan has traveled in seconds. a. How far does Juan travel (in inches) when the wheel makes one complete revolution? b. Find h(x), the height of the reflector, in terms of the distance traveled C. What is the height of the reflector after Juan has ridden 20 feet? d. Find h(t), the height of the reflector, in terms of the time t. e. What is the height of the reflector after Juan has ridden for 5 minutes? Pre-Calculus with Trigonometry