please solve 1,2,3,4 Especially 3 and 4

Comprehensive Problem 67.00 PU=100 (14076 FU FV. An investment will provide you with $100 at the end of each year for the next 10 years. What is the present value of that annuity if the discount rate is 8% annually? PU-fo 2. What is the present value of the above if the payments are received at the beginning of each year? 100x7.241 724.698FC.P. 3. If you deposit those payments into an account earning 8%, what will the future value be in 10 years? 335.671 10,498.39 4. What will the future value be if you opening the account with $1,000 today, and then make the $100 deposits at the end of each year? c Fu