I think I need to use the slicing method, disk method or washer method here for Example 1. Thank for your help and showing me step by step how to solve.

For example 2 I would also appreciate the step by step on how to solve. I guess I'm interested in the bounds of integration for each. Thanks

Example 1. Let R be the region bound by the curves y = 1/2x* and y = 2x. Find the solid obtained by revolving R about the A. X-axis B. y-axis C. The line y=-1 D. The line y=5 E. The line x=-2 F. The line x=5 Example 2. (This situation is given in example 4 in the notes) A cylindrical reservoir of diameter 4 feet and height 6 feet is half-full of water weighing 10 lb/ft3. A pump is fixed to the top of the tank. Compute the work it takes to pump the water out of the tank, then compute the work when the following variables are changed A. The pump is 5 feet above the tank (instead of on top of the tank) B. The tank is completely full (instead of half-full) C. The tank is completely full, but only pump out the top half of water