An incomplete graph of the polynomial function f(x) = 2x* - 15x + 26x2- 60x + 72 is shown on the right a. Find all zeros of the function. b. Without using a graphing utility, draw a complete graph of the function. [0.2, 0.50] by [-10, 10, 1] .. .. a. The zeros are (Use commas to separate answers as needed. Use integers or fractions for any numbers in the answers.) b. Choose the correct graph of the function below. The scale for each graph is [-5, 10, 1] by [ - 600, 600, 5]. O A. O B. OC. OD. 600-T 500- 600- 6007 O TITT 10 10 10 -5 10 -600- -600- -600 -600