$\backslash$table$[[$EOY$,($CF$)$A$,$CF$($B$),$CF$($C$),$CF$($D$)],[0,-$$$50,000,-$$$100,000,-$$$250,000,-$$$225,000],[1,-100,000,-100,000,+75,000,-75,000],[2-7,+50,000,+70,000,+75,000,+100,000]]$ Four mutually exclusive investment alternatives are illustrated in the accompanying table; the $"$do

nothing" alternative is not feasible. The cash flows $($CF$)$ are shown for a $7-$year planning horizon.

Based on the interest rate of $15\%.$ Determine which is best, using $($a$)$ the PW method, $($b$)$ the AW

method