A coin that was featured in a famous novel sold at auction in 2014 for $8, 406,000. The coin had a face value of $15 when it was issued in 1787 and had previously been sold for $265,000 in 1975. At what annual rate did the coin appreciate from its first minting to the 1975 sale? What annual rate did the 1975 buyer earn on his purchase? At what annual rate did the coin appreciate from its first minting to the 2014 sale