3. Suppose a confection company conducts a market research. They found market demand (Qd) and supply (Qs) functions for their snack are as follows, where P = price ($ per box). Qa = 600 - 20 * P (thousand boxes) Qs = 120 + 20 * P (thousand boxes) a. What is the market equilibrium price of this snack? At market equilibrium, how many boxes would be sold? b. If this company tries to price the same snack at $15 per box, what will be quantity demanded and quantity supplied at this moment? The company can achieve a market equilibrium again