The Demon is a roller coaster that has two vertical loops in a row. The radius of the first loops is 20m, and the radius of the second loops is 14m. (Assume no friction.) a. Draw a force diagram for the rollercoaster at the top of the first loop. (Hint: You're upside down!) b. Obtain F equations. c. Calculate the minimum velocity required to complete the first loop. d. Calculate the minimum velocity required to complete the second loop