Your cat's summer kitty-cottage needs a new roof. You feel a 15-year analysis period is in line with your 8-8 A cat's remaining lives. (There is no salvage value for old roofs.) Thatch Slate First cost $250 $425 Annual upkeep Service life, in years 65 30 3 5 (a) Graph the EUAC or EUAW for the alternatives. Construct a choice table for interest rates from 0% to 100%. (b) Which roof should you choose if your MARR is 12%? What is the actual value of the IRR on the incremental cost? Your cat's summer kitty-cottage needs a new roof. You feel a 15-year analysis period is in line with your 8-8 A cat's remaining lives. (There is no salvage value for old roofs.) Thatch Slate First cost $250 $425 Annual upkeep Service life, in years 65 30 3 5 (a) Graph the EUAC or EUAW for the alternatives. Construct a choice table for interest rates from 0% to 100%. (b) Which roof should you choose if your MARR is 12%? What is the actual value of the IRR on the incremental cost