Please do 3b. Thanks

3. Discounting: For the following questions, calculate the net present value. Please show your calculations! (a) Consider the following stream of payments: Now : - $100,000 One year from now: $50,000 Two years from now: $3,000 Three years from now: $50,000 Every year forever starting four years from now: $1,000 Compute the net present value of this stream of payments, using a discount rate of (a) 4% (b) 10%. (b) Consider the following stream of payments: Now : - $80,000 One year from now: $15,000 2 Two years from now: $33,000 Three years from now: $20,000 Every year, starting four years from now, for a total of 16 years: $700 (Thus, the last payment will be received 19 years from now). Compute the net present value of this stream of payments, using a discount factor of (a) 0.95 (b) 0.99