For four years, marty campbell invested $6,500 each year in harley-davidson. the stock was selling for $84 in 2014, $72 in 2015, $56 in 2016, and $74 in 2017 a. what is marty's total investment in harley-davidson? total investment b. after four years, how many shares does marty own? (do not round intermediate calculations. round your answer place.) to 1 decimal number of shares c. what is the average cost per share of marty's investment? (use the rounded number of shares computed in part b. round your answer to 2 decimal places.) average cost per share