QUESTION 5 . 2 POINTS For which value(s) of x does f (x) = 4- 7x2 + 5x + I have a tangent line of slope 4? If there is more than one answer, give all of the x-values separated by commas, e.g. if f (x) has a tangent line of slope 4 atx = 3 and x = 5 enter 3, 5