Sketch a graph of each function. Label all zeros and the coordinates of all maximum and minimum points. (Each coordinate should be accurate to the nearest hundredth.)
a. y = 2(x - 2)2 - 16
b. y = -3(x - 5)(x + 1)
c. y = x2 - 3x + 2
d. y = (x + 1)(x - 3)(x + 4)
e. y = x3 + 2x2 - 19x + 20
f. y = 2x5 - 3x4 - 11x3 + 14x2 + 12x - 8