Mazni wants to buy a house and she asks the bank officer to help. She was told that the original house cost RM 300,000 and the profit margin to the bank is 30%, which Mazni can pay to the bank by installment period of 20 years.

i- Calculate the selling price of the house if bank sells it to Mazni.

ii- Calculate the monthly payment of this house to the bank.

iii- If the profit margin of the same house increase to 40%, for the period of 15 years, calculate the new selling price and the new monthly payment.

please answer this as soon as possible