Please answer number 4! ignore the answers already on there bc they're wrong

4. Use synthetic division to find each of the function values for the function f(x) = x3 - 14x2 + 42x -10 a) f(-5)= -695 b) f(4)= -86 5. a) Find the possible rational zeros of the following function. b) Use Descartes' Rule of Signs to narrow down your list. c) Use synthetic division to find which ones work. Ax) = x3+2x2-11x -12 a. x=3 b. x=-1 C. X=-4