A.Mr. Wilson's house was purchased for $280,000 five years ago and is worth $300,000 now, and his mortgage was $ 260,000 and amortized over 25 years, at four percent interest, compounded semi- annually, what is his equity in his house now? (To the nearest $1000) (Show your calculationsYou must assume monthly mortgage payment frequency; hint, and use amortization schedule)