Concept:Equilibrium quantity is found when quantity demanded equals quantity supplied.Explanation:Given Qd=10−2p and Qs=5+3p.At equilibrium, Qd=Qs.So, 10−2p=5+3p.Collect like terms: 10−5=3p+2p.This gives 5=5p.Therefore, p=1, which matches the given price of N1.Substitute p=1 into Qd: Qd=10−2(1)=8.Check with Qs: Qs=5+3(1)=8.Thus, the equilibrium quantity is 8.Answer:8 (Option D).