Clark and Lana take a 30-year home mortgage of $125,000 at 7.1%, compounded monthly. They make their regular monthly payments for 5 years, then decide to pay $1400 per month. (a) Find their regular monthly payment. (Round your answer to the nearest cent.) (b) Find the unpaid balance when they begin paying the $1400. (Round your answer to the nearest cent.) (c) How many payments of $1400 will it take to pay off the loan? monthly payments