Martha starts saving for her retirement by making monthly deposits into a retirement account whose annual rate is $3\mathrm{.}4\%.$ She plans to retire in $22$ years with an amount of money that has the same buying power as $$250,765$ has today. If the anticipated rate of inflation if $2\mathrm{.}9\%,$ how much should each of her deposits be$?$ Jack borrows $$28,500$ to pay for a car. The loan carries an annual rate of $5\mathrm{.}8\%$ and he wants to be debt free in $7$ years by making biweekly payments $(26$ per year$).$ How much interest will he pay on this loan?