Use technology to compute the APY for each of the following accounts.
a. An account with quarterly compounding and an APR of 3.1​%
b. An account with monthly compounding and an APR of 3.1​%
c. An account with daily compounding and an APR of 3.1​%
d. Based on the results of parts​ (a), (b), and​ (c), estimate the APY for an account with continuous compounding​ (where the number of compoundings becomes very​ large).