Answer:
$2.41
Step-by-step explanation:
Anytime there is price fixing between two competitors,
if one competitor chooses to fix price it should not exceed competitors marginal cost (price) and should be above his marginal cost (price).
Since, the price fixing of $10 will be fined (previous cartel price). Then, the ideal price to maximize the profit would be below the competitor's price ($2.42) and above his marginal cost ($2.40).
Thus, the ideal price to maximize profits would be $2.41, which is above his marginal cost and below competitor price