Hi I'm stuck with my homework for solid of revolution and surface area of this figure Trapezoid with slope of -5/L. R2 = 2L and R1 = 3L/2. ANy help is appreciated.

/ ----- |---------\

/ -----| ---------\ slope = -5/L

/_____|____|__\

...............3L/2 ...2L

a. Find the equation in terms of L (vol and surface area)

b. Vol as function of L

c. Value of L that minimizes the volume

d. Minimum Volume