An engineer has been offered an Investment opportunity that will require an immediate cash outlay of $40,000 for a cash inflow of $3500 for each year of Investment. However, she must state now the number of years she plans to retain the Investment. Additionally. If the investment is retained for 6 years, a lump-sum amount of $40,000 will be returned to her, after 10 years, the lump-sum return is anticipated to be $50,500, and after 15 years, It is estlmated to be $59,000. Money is currently worth 7% per year. Determine the present worth values for 6 years, 10 years, and 15 years, and decide if the decision is sensitive to the retention perlod? The present worth when the Investment is retained for 6 years is $ The present worth when the Investment is retained for 10 years is $ The present worth when the Investment is retained for 15 years is $ The present worth is to the investment period