Answer:
a. If demand increases and supply is constant, there would be a rightward shift of the demand curve. As a result, equilibrium price and quantity would increase
b. An increase in supply would lead to a rightward shift of the supply curve. As a result price decreases and quantity increases. A decrease in demand would lead to a leftward shift of the demand curve. As a result, quantity and price decreases. Taking these two effects together, equilibrium price decreases and there is an indeterminate effect on equilibrium quantity
c. An increase in demand leads to a rightward shift of the demand curve. As a result, equilibrium price and quantity increases. A decrease in supply would lead to a leftward shift of the supply curve. This leads to a decrease in quantity and an increase in price. Taking these two effect together, there would be an increase in equilibrium price and an indeterminate effect on equilibrium quantity
d. A decrease in demand would lead to a leftward shift of the demand curve. As a result, quantity and price decreases. A decrease in supply would lead to a leftward shift of the supply curve. This leads to a decrease in quantity and an increase in price. Taking these two effect together, there would be a decrease in equilibrium quantity and an indeterminate effect on equilibrium price
Explanation:
Please check the attached images for the demand and supply diagrams
