Consider the following. f(x) = x4 - x3- 12x2 (a) Find all real zeros of the polynomial function. (Enter your answers as a comma-separated list. If there is no solution, enter NO SOLUTION X = (b) Determine whether the multiplicity of each zero is even or odd. smallest x-value ---Select-- ---Select--- largest x-value ---Select-- c) Determine the maximum possible number of turning points of the graph of a function of equal degree to f(x). turning point(s) (d) Use a graphing utility to graph the function and verify your answers. f(x) f(x) 300 300 200 200 100 100 -LX -10 -5 5 -LX 10 -10 -5 5 10 -100 -100 -200 -200 O -300 O -300 f(x) f(x) 300 300 200 200 100 100 -X -10 -5 5 -LX 10 -10 -5 5 10