$11.$ A depositor put $$30,000$ in a $4-$year CD at a nominal rate of $9\mathrm{.}00\%.$ What is the EAR for each compounding scenario and what is the amount saved at the end of each four year period?

CF Timeline:

a$.$ Semi$-$annual compounding. EAR and FV$?$

b$.$ Monthly compounding. EAR and FV$?$