Refer to Exercise 13.
a. Find the average cost function $\bar{C}$ associated with the total cost function $C$ of Exercise 13 .
b. What is the marginal average cost function $\bar{C}^{\prime}$ ?
c. Compute $\bar{C}^{\prime}(5000)$ and $\bar{C}^{\prime}(10,000),$ and interpret your results.
d. Sketch the graph of $\bar{C}$