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A new employee charged $5490 on his credit card to relocate for his first job. After noticing that the interest rate for his balance was 15% compounded monthly, he stopped charging on that account. He wishes to pay off his balance in 4 years using automatic payments sent at the end of each month. S a. What monthly payment must he make to pay off the account at the end of 4 years? b. How much total interest will he have paid? 6 a. What monthly payment must he make to pay off the account at the end of 4 years? 4 $ (Round to the nearest cent as needed.) cty 5 5: 8