1. A P50 million, 6% bond pays dividend semi annually an will be redeemed at 105 % on December 2021. It is bought on December 2018 to yield 4 % interest. Find the price of the bond. 2. A coal-fired power plant has upgraded an emission control valve. The modification costs only P800000 and is expected to last 6 years with a P20000 salvage value. The maintenance cost is expected to be high at P170000 the first year, increasing by 11% per year thereafter. Determine the equivalent present worth of the modification and maintenance cost. Use i = 8 %. 3. The DPWH expects the cost of maintenance for a particular piece of heavy equipment to be Php 50000 in year 1, Php 55000 in year 2, and amounts increasing by Php 5000 through year 10. At an interest rate of 10% per year, determine the present worth of the maintenance cost. 4. The cash flow associated with a strip mining operation is expected to be P20,000,000 in year 1, P18,000,000 in year 2, and amounts decreasing by P2,000,000 per year through year 8. At an interest rate of 12% per year, what is the equivalent annual cash flow. 5. A mechanical contractor is trying to calculate the present worth of personnel salaries over the next five years. He has four employees whose combined salaries thru the end of this year are P1,500,000. If he expects to give each employee a raise of 5 % each year, the present worth of his employees' salaries at an interest rate of 12 % per year is nearest to