$5.$ If Jason starts saving immediately for the $20\%$ down payment on his house, how much additional money will he have to save each month? Assume an investment rate of return of $7\%$ per year.

$6.$ If Jason wants to have a million dollars $($in terms of today's dollars$)$ when he retires at age $65,$ how much should he save in equal monthly deposits from the end of the next month? Ignore the cost of the wedding and the down payment on the house. Assume his savings earn a rate of $7\%$ per year $($A$.$P$.$R$.).$