i need help with 11,12,13

Calculate the present value of the following future cash flows, rounding all calculations to the nearest dollar: (Click the icon to view Present Value of $1 table.) (Click the icon to view Present Value of Ordinary Annuity of $1 table.) 11. $8,000 received in thirteen years with interest of 4% 12. $8,000 received in each of the following thirteen years with interest of 4% 13. Payments of $4,500,$6,000, and $5,000 received in years 1,2 and 3, respectively, with interest of 6% Reference Reference