Answer:
The demand curve for Pepsi and Coke would have shifted to the left, causing the price of both products to decrease and the profits for both companies to fall.
Explanation:
As in the question it is mentioned that the if the Pepsi and Coke do not change the formula and all other things being constant so the demand for the goods in case of the competitive market is that the demand curve is shifted to the left which results in a decrease in the price of both goods also due to price falls the profits for both companies dropped.