You have just paid $$630,000$ for a four$-$month negotiable $CD,$ which has a $4\mathrm{.}5$ percent annual interest rate $($single payment yield$).$

a$.$ If the market rate on the $CD$ rises to $5$ percent, what is its current market value?

b$.$ If the market rate on the CD falls to $4\mathrm{.}25$ percent, what is its current market value?

$($For all requirements, do not round intermediate calculations. Round your answers to $2$ decimal places. $($e$.$g$.,32\mathrm{.}16))$

Answer is complete but not entirely correct.

$\backslash$table$[[,,$Amount$],[$a$.,$Current market value,$$650,107\mathrm{.}50x$