Final answer:
The equilibrium price of corn would decrease and the equilibrium quantity would increase due to the large crop of Silver Queen Corn produced by Maryland farmers and the increase in barbecues.
Step-by-step explanation:
The unexpectedly large crop of Silver Queen Corn produced by Maryland farmers, combined with the hot summer increasing the number of barbecues, resulted in changes in the equilibrium price and quantity of corn. With a larger supply of corn, the equilibrium price of corn would decrease, as the supply curve shifts to the right. At the same time, the equilibrium quantity of corn would increase, as the higher supply meets the increased demand at a lower price.