Your brother-in-law has discovered a map to a lost gold mine in the Arizona desert. In order to fund his expedition, he wants you to give him $15,000 today (t0), and another $10,000 at the end of the first year (t1). You must contribute $8,000/year for periods t2 - t5. Hell then give you $100,000 in Year 6 (t6) when the gold is recovered. Use a discount rate of 13%. What is the NPV and IRR of this proposal? What does the IRR tell you and do you trust it? Why or why not? What do you think accounts for the relatively high discount rate?