Please help me to solve these questions with some explanation so that I can solve similar ones.

Q1.Sun Woo wants to purchase an annuity that will pay him $1,000 a month for fifteen years. If he can negotiate a 4.5% rate of return, how much will he have to pay today in order to purchase this annuity?

Q2 Master Meter is planning on constructing a new $20 million facility. The company plans to pay 20% of the cost in cash and finance the balance. How much will each monthly loan payment be if they can borrow the necessary funds for 30 years at 9% compounded monthly?