$7-34.$ Refer to Problem $6-77.$ The alternatives all have a MACRS $($GDS$)$ property class of three years. If the effective income tax rate is $25\%$ and the after$-$tax MARR $=11\mathrm{.}25\%$ per year, which alternative should be recommended? Is this the same recommendation you made when the alternatives were analyzed on a before$-$tax basis? $(7\mathrm{.}10)$

$6-77.$ Complete the following analysis of investment alternatives and select the preferred alternative. The study period is three years and the MARR $=15\%$ per year. $(6\mathrm{.}4)$

$\backslash$table$[[,$Alternative A$,$Alternative $B,$Alternative C$],[$Capital investment,$$11,000,$$$16,000,$$$13,000],[$Annual revenues,$4,000,6,000,5,540],[$Annual costs,$250,500,400],[$Market value at EOY $3,5,000,6,150,2,800],[$PW$(15\%),850,???,577]]$

$($a$)$ Do nothing

$($b$)$ Alternative $A$

$($c$)$ Alternative $B$

$($d$)$ Alternative $C$