change in quantity demanded with unchanged demand is represented by a movement from point a to point ______. This change is caused by __________________.

a change in quantity supplied with unchanged supply is represented by a movement from point b to point ________. This change is caused by __________________.

d2 is the demand curve, then a price of P3 would result in a [ surplus / shortage ] of _____________ units and total value of _____________.

d2 is the original demand curve for a normal good and income decreases, which price and quantity might result? It is at point _______ with price ________ and quantity ________.

d2 is the original demand curve and the price of a substitute in consumption rises, which price and quantity might result? It is at point __________, with price _________ and quantity _______.