(-2, 20), (-1, 0), (0, -2), (1, 4), (2, 0) (a) Determine the polynomial function of least degree whose graph passes through the given points. P(x) = (b) Sketch the graph of the polynomial function, showing the given points. y 60 40 20 X -2 1 2 3 4 -20 -4 -3 -2 -1 C y 20 20 -20 -40 -60 1 2 y 20 X -4 -3 -2 -1 1 2 -20 C y 60- 40 20 20 -2 -1 -20 -40 -60- 2 3 X 4