The following two mutually exclusive investment alternatives are being evaluated using the IRR method. The alternatives have a 5 -year service life with no salvage value (a) Calculate the incremental IRR of investing in Atternative Y rather than Alternative X A. 18% B. 12.4% C. 99% D. 7.4% (b) If the incremental IRR you calculated in (a) is higher than the MARR, which allernative is more economical and what is the basis for your decision? A. They are economically equivatent because Alternative M has a higher IRRR but based on a lower initial capital investment, whilo Atornative X has a lower IRR but based on a higher inillal capital investment B. Anemative M because it has an IRR higher than that of Aloornative X C. Atternative X because the incrememal IRR is highier than the MARR D. Atternative M because the incremental IRR is highier than the MARR E. Atternative X because it this both a higher initial capital invesiment and higher annual revenues than aternative M