6-8 need help asap

Part 2: Show your work as indicated for each of the following problems. 6. Set up, but do not evaluate, the integral needed to find the area enclosed by 5 pts y = 2 cos x and y = 2 sin 2x from - ? ' 2 shell The of these and 7. Find the exact area enclosed by x = 9 - y2 and x = y2 - 9 9 pts Show all of your work. 8. Find the exact average value of f(x) = x V4 + 2x2 on the interval [1,3] 9 pts Show all of your work