Answer:
Penguin patties and mookies should be marketed together
Step-by-step explanation:
The cross price elasticity of supply calculates the effect of the percentage change in quantity supplied on the percentage change in price
If the cross-price elasticity of supply is positive, it means that the goods are complementary goods.
Complementary goods are goods that are sold together and they should be marketed together.
The decreases in price of penguin patties should lead to a decrease in supply for the complement good. Since the quantity of mookies sold decreases by 5%, they are complements and should be marketed with the penguin patties