Calculate the Net Present Value for each of the following scenarios, using an equivalency rate of 10%; a) The promise of $3,000 to be received three years from now. b) The following cash payments: $1,000 to be received in one year, $2,000 to be received in two years, and $3,000 to be received in three years. c) Eight year-end payments of $20,000 to be received at the end of each of the next eight years. d) Three $1,0000 payments to be made at the ends of years 6, 7, and 8