2. Bema has 10 more years of service in the university as a staff. She plans to invest P 9,000 of her salary at the end of the first year and thereafter she plans to invest the amount with an annual increase of P 500 for the next 9 years with an interest rate of 15 %. a. What is the annual equivalent series amount at the end of every year for the next 10 years b. Draw the cash flow diagram of the payments made in part "a". c. How much will the total amount investment of Bema be at the end of the 10th year based on the above series of investment d. Draw the cash flow diagram of the uniform gradient series annual equivalent amount