Ineed it right now when the burner in a hot air balloon is turned on, the temperature of the air in the balloon causing its volume to and the balloon a) decreases, expand, sink b) increases, expand, rise c) decreases, contract, rise d) increases, contract, sink

Atank has a shape of a cone with a radius at the top of 2 m and a height of 5 m. the tank also has a 1 m spout at the top of the tank. the tank is filled with water up to a height of 2 m. find the work needed to pump all the water out the top of the spout. (use 9.8 m/s2 for g and the fact that the density of water is 1000 kg/m3.)