Apple Store runs a promotion on MacBook Pro for $$3500.$ They offer to the buyer no money down no payments for $12$ months with a two$-$year financing plan with $24$ equal monthly payments at the end of each month. What should be the monthly payment $\_\_\_\_\_(14)\_\_\_\_\_\_\_$$ if Apple Store earns $6\mathrm{.}3\%$ compounded monthly on its account receivable during both the deferral period and the repayment period? The monthly payment would change to $\_\_\_\_\_(15)\_\_\_\_\_$$ if intereste rate is $6\mathrm{.}3\%$ compounded annually.