Please help me.

1. Draw a cash flow diagram showing payments of $6000 now, $2500 two years from now and $4500 six years from now. For these payments: Find the present worth equivalent at an interst rate of 7% per year. Find the future worth equivalent at the en of year 8 at an interest rate of 7% per year. What will be the size of a uniform series through years 1-5 (Al-s ?)