4. [8 pts] A frozen food producer determines that its daily revenue, R(x), in dollars, from the sale of x frozen dinners is 3 R05) = tl-xZ a. Find the additional revenue when the production increases from x = 70 to x = 71, rounding your answer to 4 decimal places. b. Find the marginal revenue when x = 70, rounding your answer to 4 decimal places. Interpret this value in the scope of the problem. c. Compare this value with the value you found in part (a). How are they related