A) You will recieve annual benefit $129.5 for 10 years if you invest $1,000 today. Calculate the internal rate of return for this investment.
B) For the above a, you can get an increase of annual benefit $25 more if you increase the investment by $141.25 today. Calculate the internal rate of return for this incremental cash flow. When your MARR is 4%, decide if this increment of investment is acceptable or not.
C) For the above a, you can get the annual benefit $90 for an infinite period. Calculate the internal rate of return and decide if it is acceptable or not acceptable. MARR 4%.