Comparison of returns. Baker Baseball Cards, Inc. originally purchased the rookie card of Hammerin' Hank Aaron for $40.00. After holding the card for 4 years, Baker Baseball Cards auctioned the card for $200.00. Another company, Bohenick Classic Automobiles, restores and rebuilds old classic cars. This company purchased and restored a classic 1957 Thunderbird convertible 4 years ago for $7,100.00. Today at auction, the car sold for $56,800.00. a. What are the holding period returns of these investments? b. What are the simple annual returns on these investments? c. What are the effective annual returns on these investments? d. Which investment had the higher holding period return? Which had the higher simple annual return? Which investment had the higher effective annual return? a. What is the holding period return (HPR) of the baseball card? \% (Round to two decimal places.) What is the holding period return (HPR) of the car? \% (Round to two decimal places.)