You can choose any one of the following prizes. If your discount rate is 10% (annual compounding), which is the most valuable prize, i.e. has the greatest present value? a. A lump sum payment of $25,000 at the end of 10 years. b. A perpetual stream of annual payments of $1,000 starting in one year. c. A perpetual stream of annual payments starting at $500 in one year and increasing at 5% per year thereafter. d. A lump sum payment of $10,000 today. e. Five annual payments of $2,800 - the first payment occurs one year from today.