An airplane took off at 1 p. m. and climbed to 20,000 feet. It leveled off for about an hour and then climbed again to 35,000 feet. The pilot announced there was some turbulence, and he took the plane down to 30,000 feet. The plane stayed at that altitude for an hour before beginning its descent. It landed at its destination at 7 p. m. how would it look on a graph?​