A roller coaster, 12000kg, called the Pinball Machine uses a catapult to accelerate the riders, up to a speed sufficient for them to begin at ground level and complete a 70 m high loop without falling out (v= 19 at the top).A)If k=90000 how far would the catapult have to bend back before launching the coaster? B)What would be the max velocity of the coaster? C)How high uphill could it coast at the end of the ride?