Solve the problem. I) A water tank is shaped like an inverted cone with height 18 m and base radius 3 in (see I) figure). It 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. e 18m 2) A spring on a horizontal surface can be stretched and held 05 in from its equilibrium 2] position with a force of45 N4 How much work is done in stretching the spring 3 m from its equilibrium position