The marginal revenue (in thousands of dollars) from the sale of x gadgets is given by the following function. The revenue from 115 gadgets is $37,271.-2/3 MR(x) = 4x (= 4x (x² +28,000)(a) Find the revenue function.(b) What is the revenue from selling 250 gadgets?(c) How many gadgets must be sold for a revenue of at least $30,000?(a) R(x) =(Simplify your answer. Round to the nearest integer as needed.)(b) The revenue from selling 250 gadgets is $.(Type a whole number.)(c) To generate a revenue of at least $30,000, approximately(Type a whole number.)