Please help make a cash flow diagram and solve of the following

1. The tag price of a certain commodity is for 100days, If paid in 31 days, there is a 3% discount. What is the simple interest paid. 2. A time deposit of P 110,000 for 31 days earns P 890.39 on maturity date after deducting the 20% withholding tax on interest income. Find the rate of interest per annum. 3. A company invests P 10,000 today to be repaid in five years in one lump at 12% compounded annually. If the rate of inflation is 3% compounded annually, how much profit in present day is realized over five years? 4. Compute the effective rate for an interest rate of 16% compounded annually 5. Convert 12% compounded semi annually to x% compounded monthly