i need help with question A B C show work please

13. Over a four-year period, LaKeisha Thompson purchased shares in the Oakmark Investor Class Fund. Using the information below, answer the questions that follow. You may want to review the concept of dollar cost averaging in Chapter 12 before completing this problem. B. At the end of four years, what is the total number of shares purchased? C. At the end of four years, what is the average cost for each share? At the end of four years, the average cost for each share is $69.95 as illustrated below. $6,000 total investment 85.78 total shares =$69.95