Please show all work

1. Find the present value of an annuity of $900 per year for 7 years if the interest rate is 18 per cent.

2. Find the present value of $1100 to be received 1 years from today if the interest rate is 18 per cent.

3. Find the future value at the end of 9 years of $600 invested today at an interest rate of 15 per cent.

4. Find the present value of an annuity of $200 per year for 7 years if the interest rate is 7 per cent.

5. Find the future value of an annuity of $300 per year for 10 years if the interest rate is 14 per cent.

6. Find the present value of an annuity of $200 per year for 1 years if the interest rate is 11 per cent.

7. Find the present value of the following cash flow stream if the interest rate is 16 per cent.

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$100$200$200$100$400$300$100

8. Find the future value of an annuity of $800 per year for 6 years if the interest rate is 14 per cent.

9. Find the future value at the end of 1 years of $800 invested today at an interest rate of 13 per cent.

10. Find the future value at the end of 1 years of $700 invested today at an interest rate of 7 per cent.