For four years, Marty Campbell invested $7.000 esch year in Harley-Davidson. The stock wos selling for $72 in 2017. $78 in 2018. $59 in 2019, and $83 in 2020. a. What is Marty's total investment in Harley-Davidson Answer is complete and correct. Total investment 13 28,000 b. After four years, how many shares does Morty own? (Round your Intermediate calculations and final answer to nearest whole number.) Answer is complete but not entirely correct. Number of shares 292% c. Whet is the average cost per share of Merty's investment? (Use the rounded number of shares computed in part b. Round your answer to 2 decimal places.) Answer is complete but not entirely correct. Average cost per share 95.09