A couple who borrow $70,000 for 15 years at 8.4%, compounded monthly, must make monthly payments of $685.22.

(a)

Find their unpaid balance after 1 year. (Round your answers to the nearest cent.)

$

(b)

During that first year, how much do they pay towards the principle? (Round your answer to the nearest cent.)

$

During that first year, what are their total payments? (Round your answer to the nearest cent.)

$

During that first year, how much interest do they pay? (Round your answer to the nearest cent.)