The cost function of a firm is given by C (x) = 250,000 + 15,000. 0.3x3. i) What is the firm's marginal cost (MC)? ii) Evaluate MC(x = 100)? iii) What does your answer from ii) suggest about the firm's cost when x = 100? The revenue function (MR) of a firm is given by the following: R(2) = 7x + 22 100 i) What is the firm's marginal revenue? ii) Evaluate MR(x = 100) iii) What does your answer from ii) tell us about the firm's revenue