The figures are invented. In the market for a good, quantity demanded is 90, 70, 50, 30 and 10 units at prices of $2, $4, $6, $8 and $10, and quantity supplied is 10, 30, 50, 70 and 90 units at the same prices. Using a demand and supply diagram, explain how the market would adjust if the price were $4.

Paper 2-style short part (standalone practice; not an IB question).