Answer:
d) $3: $6
Explanation:
The computation is shown below:
Before the one firm cheats, the firm revenue is
= $10 × $6
= $60
Before the one firm cheats, the firm revenue is
= $9 × $7
= $63
No cheating firm's revenue
= $9 × $6
= $54
Now in case of cheating, it is
= $63 - $60
= $3
And, in the case of non cheating, it is
= $60 - $54
= $6