Effect of Supply Restriction: If the shop owner decides to restrict supply, it would lead to a decrease in the quantity available in the market. This is typically represented by a leftward shift in the supply curve. Initially, you have the demand curve (D1) intersecting the supply curve (S1) at point A, resulting in the equilibrium price (P1) and quantity (Q1). When the shop owner restricts supply, it shifts the supply curve to the left to S2, intersecting the demand curve at point D. This leads to a higher equilibrium price (P2) and a lower quantity (Q2) available in the market. In this case, restricting supply reduces the quantity available in the market and drives up prices, which can result in higher profits for the shop owner but potentially less access to the product for consumers