you are making a $40,000 investment and feel that a 12 percent rate of return is reasonable given the nature of the risks involved. you feel you will receive at least $10,000 in the first year, $20,000 in the second year, $40,000 in the third year, and potentially could see a cash inflow of $6,000 in the fourth year. what is the net present value of this investment given your expectations?