4. A right conical tank is positioned with the apex at the bottom. The height of the tank is 7 feet and the radius of the base is 4 feet. Set-up (but no need to evaluate) the integral needed to nd the work done in lling the tank by pumping water in through a hole in the bottom. Use 62.4 pounds/ft3 for the weightdensity of water. Draw the cone, and clearly indicate where you choose the origin\