$4)$ Find the account balance at the end of $10$ years, if you deposit $15,000$ in an account today if

a$.$ The bank pays interest at $12\%$ per year.

b$.$ The bank pays interest at $6\%$ every $6$ months.

c$.$ The bank pays interest at $3\%$ per quarter,

d$.$ The bank pays interest at $1\%$ per month.

What do you observe when you compare the balances for the four scenarios listed.