2. In the following market model. p is price. q\" is quantity demanded and q5 is quantity supplied: 9D = ii - 2p. and 95 = -l -:- 4p. Suppose that the market does not clear instantaneously. but that price increases when there is excess demand and decreases when there is excess supply: . 1 P=('ID"I$)- where f: E 5.1% {b} _ _ Write out a rst-order differential equation of p