Answer: The price level chosen to maximize profits will be $ 6.71
Step-by-step explanation:
Whenever there is price fixing between two competitors, and one of the competitor decides to choose a price level. Such competitor must ensure that the price level chosen to maximize profit does not exceed his or her competitor's marginal cost but can be above his or her marginal cost .
Since the price fixing is $10 from previous cartel price so the best price level to maximize the profit would be less than my rival's price of $ 6.72 and more than my marginal cost of $ 6.70 which is $ 6.71