Physics/Calculus Question!!?

Question

(1 pt) A circular swimming pool has a diameter of 20 m, the sides are 3 m high, and the depth of the water is 1.5 m. (The acceleration due to gravity is 9.8 m/s2 and the density of water is 1000 kg/m3.) 
How much work (in Joules) is required to: 

(a) pump all of the water over the side? 
(b) pump all of the water out of an outlet 1 m over the side?