Non$-$annual compounding

$7.$ You just deposited $$3,000$ in a bank account that pays a $6\mathrm{.}0\%$ nominal annual interest rate, compounded quarterly. If you also add another $$6,000$ to the account one year $(4$ quarters$)$ from now and another $$9,000$ to the account two years $(8$ quarters$)$ from now, how much will be in the account three years $(12$ quarters$)$ from now? $($could you show me how to do this on a financial calculator$)$

a$.$ $$19,898\mathrm{.}08$

b$.$ $$20,047\mathrm{.}32$

c$.$ $$20,196\mathrm{.}55$

d$.$ $$20,557\mathrm{.}33$

e$.$ $$21,000\mathrm{.}00$