4. Figure below shows the points q1 and q2, where marginal revenue equals marginal cost $/unit MC MR q (units) 91 92 a. On the graph of the corresponding total cost and total revenue function in figure below, label the points qi and q2. Using slops, explain the significance of these points. C(q) R(9)MR q (units) 91 92 a. On the graph of the corresponding total cost and total revenue function in figure below, label the points qi and q2. Using slops, explain the significance of these points. C(q) R(q) q (quantity) b. Explain in terms of profit why one is a local minimum, and one is a local maximum