Given the following differential equations, verify that they are exact differential equations and solve them using the four-step procedure. i) ii) iii) iv) v) b. 1. 11. 111, (2yt-3y)dy + (y-t)dt = 0. (yt + y)dy + ty dt=0. 2yt'dy + 3ytdt = 0 (8y-t+3)dy +(3t-y-12)dt -0. e'dy + (St + y'e')dt = 0. Given the following price elasticity of demand, derive the demand function Ege = -1/3 For=-2 Eqp=-(6P+P)/Q