As a winner of a local competition, you can choose one of the following prizes: (a) $100,000 now (b) $180,000 at the end of 4 years (c) $11,400 a year forever (starting next year) (d) $6,500 next year and increasing thereafter by 5% a year forever (e) $19,000 for each of 10 years (starting next year) If the annual discount rate is 12%, which prize is the most valuable