Please answer all three

QUESTION 7 A leftward shift of the demand curve in a market with an upward-sloping supply curve will lead to a(n) decrease in equilibrium price. O excess supply at the old equilibrium price. O decrease in quantity supplied. O All of these. QUESTION 8 Long-run market supply curves are upward sloping if O firms are identical. the number of firms is unrestricted in the long run. O input prices rise as the industry expands. All of these. QUESTION 9 Consumers who place a high value on a good are better off with pricing in the following order: 1)_ ;2 )_ ; 3 ) competitive market; perfect price discrimination; single-price monopoly competitive market; single-price monopoly; perfect price discrimination single-price monopoly; competitive market; perfect price discrimination O Unable to determine