Holding period and annual$($investment$)$ returns. Bohenick Classic Automobiles restores and rebuilds old classic cars. The company purchased and restored a classic $1957$ Thunderbird convertible $8$ years ago for $$$$7,800\mathrm{.}00.$ Today at$$ auction, the car sold for $$$$93,600\mathrm{.}00.$ What are the holding period return and the annual return on this$$ investment?