Question 8 Solve the problem. It takes 100 J of work to stretch a spring 0.5 m from its equilibrium position. How much work is needed to stretch it an additional 0.5 m? Question 9 Solve the problem.D Question 9 4 pts Solve the problem. A water tank is shaped like an inverted cone with height 9 m and base radius 1.5 m (see figure). If the tank is full, how much work is required to pump the water to the level of the top of the tank and out of the tank? Express the answer in terms of n. 15m 9 m O 893,025n1 J 148,837.5n J 198,450 J 5,358,150n J 4 pts D Question 10