please solve all parts

A woman buys a house for $290,000. She pays $60,000 down and takes out a mortgage at 6.9% on the balance. Find her monthly payment and the total amount of interest she will pay if the length of the mortgage is (a) 15 years; (b) 20 years; (c) 25 years. (d) When will half the 20-year loan be paid off? (a) For the 15-year mortgage, the woman will make monthly payments of $ (Do not round until the final answer. Then round to the nearest cent.) The total amount of interest the woman will pay is $ (Do not round until the final answer. Then round to the nearest cent.) (b) For the 20-year mortgage, the woman will make monthly payments of $ (Do not round until the final answer. Then round to the nearest cent.) The total amount of interest the woman will pay is $ (Do not round until the final answer. Then round to the nearest cent.) (c) For the 25-year mortgage, the woman will make monthly payments of $ (Do not round until the final answer. Then round to the nearest cent.) The total amount of interest the woman will pay is $. (Do not round until the final answer. Then round to the nearest cent.) (d) Half the 20-year loan will be paid off after payments. (Round up to the nearest integer.)