Ineed with these two questions !

javier owes $4,289 on a credit card with 17.5% interest rate. what is the monthly payment he should make to pay off the debt in 12 months, assuming he does not charge any more purchases with the card?

a. $71.43
b. $357.43
c. $392.20
b. $877.24

carl owes $3,760 on her electronics boutique credit card with a 22.4% interest rate. she owes $3,214 on her miscellaneous goods credit cards which has a 18.7% interest rate. what is the total monthly payment needed to pay off both cards in three years, assuming she makes fixed payments and does not charge any more purchases with the card?

a. $191.22
b. $251.30
c. $258.42
d. $264.33