i need solution

4. [10 points] The graph of the polynomial f (x) is given below. Answer the questions below. f(a) 3- 12 0 -21 a. [4 points] Fill in the blanks. Describe the end-behavior. i. As x - f (x) - ii. As x - f(x) - b. [6 points] If f (x) has degree 4, find the factored form of f (x)