How will each of the following changes in demand and/or supply affect equilibrium price and equilibrium quantity in a competitive market? That is, do price and quantity rise, fall, or remain unchanged, or are the answers indeterminate because they depend on the magnitudes of the shifts? a Supply decreases and demand is constant Price and quantity b. Demand decreases and supply is constant. Price and quantity c. Supply increases and demand is constant Price and quantity d. Demand increases and supply increases Price: and quantity e. Demand increases and supply is constant. Price and quantity 1. Supply increases and demand decreases. Price and quantity g. Demand increases and supply decreases. Price and quantity h. Demand decreases and supply decreases. Price and quantity