Problem 4: [12 pts] A spherical tank of radius 7m is filled to a height of 8m with water. Calculate the volume of the water in the tank and simplify your final answer. Additional Directions: You must draw and label the tank and include a 2D rendering of the tank as a solid of revolution in order to get credit for your revisions. The rendering should be a region in the xy-plane with the axis of revolution, along with any necessary quantities in the integral, and the equations that form the boundary curves, clearly labeled. ( Make sure to include a solution, a reflection, and an reference to an example of a similar problem from elsewhere in the course)