More Info a. Suppose that the capital investment of Alternative 1 is known with certainty. By how much would the estimate of capital investment for Alternative 2 have to vary so that the initial decision based on these data would be reversed? The annual MARR is 15% per year. b. Determine the life of Alternative 1 for which the AWs are equal. Click the icon to view the interest and annuity table for discrete compounding when the MARR is 15% per year. a. The capital investment of Alternative 2 would have to be $6088 or less for the initial decision to be reversed (Round to the nearest dollar.) b. The life of Alternative 1 for which the AWs are equal is years. (Round to one decimal place.)