Business Math - Give the Correct Answer and Show Complete Solution.

1. Find the present value and the amount of the annuity due of P4,350 payable at the beginning of each month if interest is at a.) [12%, m=12] for 2 years and 4 months, b.) [16%, m=12] for 4 years and 1 month.
2. To discharge a debt, interest included, Mr. Lim agrees to pay P6,000 at the beginning of each 3 months for 3 years and 3 months at 15% compounded quarterly. A.) Find the original size of the debt, B.) find the remaining liability of Mr. Lim just before he makes his 4th payment, and C.) just after his 7th payment.