You want to buy a new sports coupe for $$75,400,$ and the finance office at the dealership has quoted you a loan with an APR of $7\mathrm{.}8$ percent for $60$ months to buy the car.

a$.$ What will your monthly payments be$?($Do not round intermediate calculations and round your answer to $2$ decimal places, e$.$g$.,3216.)$

b$.$ What is the effective annual rate on this loan? $($Do not round intermediate calculations and enter your answer as a percent rounded to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$

$\backslash$table$[[,],[$a$.,$Monthly payment,$],[$b$.,$Effective annual rate,$\%$