. (10 pts) An aquarium 20 ft long, 10 ft wide, 7 ft deep, and the depth of the water is 6 ft. Write an integral for the work needed to pump all of the water out of the aquarium. (Use the fact that the density of water is 62.5 lb/ f 153.) Fill out the following steps: 0 Split up the water into n layers with thickness A33. 0 Approximate the work done to pump the approximating layer whose height is y, measured from the bottom of the aquarium. 0 Adding and taking the limit. 9 Express the work as an integral