a. A coin sold at auction in 2017 for $2,897,000. The coin had a face value of $10 when it was issued in 1795 and had previously been sold for $310,000 in 1970. At what annual rate did the coin appreciate from its first minting to the 1970 sale? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) b. What annual rate did the 1970 buyer earn on his purchase? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) At what annual rate did the coin appreciate from its first minting to the 2017 sale? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) C. a. Rate of return from 1795 to 1970 b. Rate of return from 1970 to 2017 c. Rate of return from 1795 to 2017 % % %