You plan to borrow $300,000 at a 4% annual interest rate for your mortgage. The terms require you to amortize the loan with 30 year equal end-of-month payments (i.e., totally 30*12=360 payments).

(1) In Year 3 (i.e., payment #25 - Payment #36), how much principal and interest will be paid respectively? (2) In Year 8, how much principal and interest will be paid respectively? (3) In Year 15, how much principal and interest will be paid respectively? (4) In Year 30, how much principal and interest will be paid respectively?

Please show each step of the calculations, not in excel