Problem $3(10$ points$)$

A married couple is trying to finance their three$-$year$-$old son's college education Mole can be deposited at the end of each quarter at $8\%$ interest compounded quarterly.

a$)$ What end$-$of$-$quarter deposit must be made from the son's $3$ rd birthday to his $18$ th birthday $(15$ years$)$ to provide $$80,000$ on each birthday from the $19$th to the ${22}^{nd}(4$ years$)?7$P

b$)$ Draw the cash flow in the white space below. $3$P