Helen purchased a house for $425,000. She made a down payment of 25% and received a mortgage for the remaining amount at 6.02% compounded semi-annually amortized over 25 years.

a) Calculate the monthly payment if she makes her payment at the end of each month.

b) What is the cost of financing assuming nothing changes for the period of 25 years?

c) Determine the number of payments needed if Helen decided to pay $900 at the end of every week instead? (Assume no rate changes)

d) Determine the amount of interest saved by using the strategy in part c as opposed to part a

Please show me calculations and buttons to press on the calculator please!

Thank you so much! Ill be sure to give a big thumbs up :D