An airplane is cruising along at a constant velocity of 245m/s East. Amazing Austin is on this airplane and wants to build a roller coaster out of the friction-less knex toys he brought. He builds a hill that is 1.5m high and then a loop to loop that is .7m high. He puts the .25kg cart at the top of the hill and enjoys the roller coaster.

How much energy did the cart have at the top of the hill and at the top of the loop to loop?