You deposit today $$15,000$ into a certificate of deposit.

Its annual percentage rate $($APR$)$ is constant at $6\%.$

You do not intend to make any other deposits or withdrawals.

a$)$ How many years will it take for your initial balance to grow to $$25,000,$ if compounding is annual.

b$)$ a$)$ How many years will it take for your initial balance to grow to $$25,000,$ if compounding is monthly.

Round up your final answer.

a$)9$ years; b$)10$ years

a$)10$ years; b$)10$ years

a$)9$ years; b$)9$ years

a$)10$ years; b$)9$ years