Answer :
Final answer:
The equilibrium quantity and price of potatoes are impacted by changes in population and potato harvest due to a new fungus, resulting in potential shifts in supply and demand forces.
Explanation:
Equilibrium quantity and equilibrium price of potatoes will be affected by a decrease in population and a new type of potato fungus wiping out 30% of the harvest. The decrease in population will lead to a lower equilibrium quantity, while the potato fungus reducing the harvest will likely increase the equilibrium price due to a decrease in supply.