I need assistance with this assignment

4. Find the revenue function for a purse manufacturer if the marginal revenue, in dollars, is given by R'(x) = (1 - x)e2x-*, where x is the number of thousands of purses sold. 5. Evaluate the integral, if it exists. a. '2(x4 - 3x1/3 + 1) dx b. Si (2ex -2) dx 6. Find the area enclosed by the given curves. a. y=x ,y=-x,x=-1,x = 1 b. y = x, y = = x=e x