6. Moira and Alexis are working on the following problem: Given spherical tank with a radius of 2 m is full of water, with density 1000 kg/m. Assume the water is pumped from the surface and there is no water in the spout at the beginning. Find the work required to pump the water out of the spout. 1m 2m (a) Moira created the following picture for the problem: Explain if Moira's picture is valid for approaching and solving the problem (b) Alexis came up with the diagram for the problem: Explain if Alexis's diagram is valid for approaching and solving the problem. (c) Find the work required to pump the water out of the spout.