3. Consider the consumption function: C = 600+.9Y, where C represents consumption and Y represents disposable income (i.e., Y-T). a. What is the equilibrium level of income and consumption in this economy assuming T=0? (Hint: at equilibrium Y=C) How much savings occurs in this equilibrium? Imagine that the citizens of this country impose an income tax of 10% on themselves. After imposing this tax, how what is the new value of equilibrium income and consumption in this economy? b. c.