4. a) Sketch a possible graph of a polynomial function that meets the following criteria: i. As x approaches negative infinity, y approaches negative infinity ii. Only has zeros at x =- 1, 1, 2 iii. Has a double root at x=1, all other roots have order 1 iv. Has 3 turning points 104 v. Has y-intercept at y = 8 b) What is the equation of your proposed polynomial function in factored form? 5 -10 -5 0 5 10 -5 10