1. The factory manager estimates that P2,500,000 will be needed in 73/2 years. He decides that the factory should anvest a sum every 6 months in a fund. Interest is earned at 6% converted semi-annually. a. How much is the semiannual investment? b. How much will be in the fund after the 12th deposit? c. How much interest is earned on the 6th deposit date? d. How mach will the fund increase be on the 11th deposit date? e. Construct the first + lines of the sinking fund schedule