A coin sold at auction in 2017 for $6,930,000. The coin had a face value of $10 when it was issued in 1786 and had previously been sold for $230,000 in 1974. b. At what annual rate did the coin appreciate from its first minting to the 1974 sale? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) What annual rate did the 1974 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 1786 to 1974 b. Rate of return from 1974 to 2017 c. Rate of return from 1786 to 2017