a. Calculate the IRR for each of the three cash-flow diagrams that follow. Use EOY zero for () and EOY four for (i) and (m) as the reference points in time, What can you conclude about "reference year shift" and proportionality issues of the IRR method? b. Calculate the PW at MARR=10% per year at EOY zero for (i) and () and EOY four for (a) and (). How do the IRR and PW methods compare? Click the icon to view the cash-flow diagrams. Click the icon to view the interest and annuity table for discrete compounding when the MARR is 10% per year. a. Calculate the IRR for each of the three cash-flow diagrams. (Round to one decimal place) IRR for (0) - IRR for (ii) - IRR for (I) = % $280 $280 $280 $280 $280 i. 1 4 2. 3 End of Year 5 $1,050 $280 $280 $280 $280 $280 $280 $280 $280 $280 $280 TO 4 ji. 5 6 7 8 9 End of Year $1,050 $1,400 $1,400 $1,400 $1,400 $1,400 0 4 5 8 9 6 7 End of Year $5,250