Answer:
• One firm to have left.
• At least one will be suffering.
Step-by-step explanation:
There are four companies in this scenario which means that demand should at least be 4 times the production for all of them to sell.
With demand at only 2.5 times, at least one company will not be selling enough cars to survive in the industry so they will exist.
Another one will stay but will face tough times because a demand of 2.5 times production will not be enough to Carter or three companies.