Answer and Explanation:
The computation is shown below;
a.
Particulars        Comp A      Comp B       Comp C
cash revenue      $61,000      $61,000       $61,000
Less: depreciation   $16,250     $36,000       $21,775
($72,000  - $7000) ÷4]  {$72,000 × (25%× 2)] ($72,000 - $7,000) × $67,000 ÷ $200,000)
net income         $44750        $25,000      $39225
b. As it can be seen that the net income for the company A is considered to be the highest and the same is to be considered