10. Find the amount of a P42,000 ordinary annuity payable quarterly for 4 years. Money is worth 16% compounded quarterly. 11. The monthly payment of 6 -year loan with interest at 15.3% compounded monthly is P36,000. What was the original principal amount of the loan. 12. If money is worth 14% compounded quarterly. How much must be deposited every quarter in a fund to have P500,000 at the end of 15 years. 13. Determine the interest rate compounded annually at which the P8,200 payment every year will amount to P90,000 in 8 years