An investor needs $$11,000$ in $18$ years.

$($a$)$ What amount should be deposited in a fund at the end of each quarter at $7\%$ compounded quarterly so that there will be enough money in the fund?

$($b$)$ Find the investor's quarterly deposit if the money is deposited at $9\%$ compounded quarterly.

$($a$)$ The deposit should be $

$($Round to the nearest cent as needed.$)$

$($b$)$ The deposit should be $

$($Round to the nearest cent as needed.$)$