The revenue in dollars generated from a sale of x picnic tables is given by R(x) = 76x - 200 Answer parts (a) through (d). (a) Find the marginal revenue when 6000 tables are sold. (b) Estimate the revenue from the sale of the 6001st table by finding R'(6000). (c) Determine the actual revenue from the sale of the 6001st table. (d) Compare your answers for parts (b) and (c). What do you find