13) For the graph of the piecewise function below: unctor ly = f ( X ) = mx+ b 8 ( 2, 1) - 1 1 2 3 4 5 6 x open circle = - 2 (21 -3 ) y = closed circle = =or> 2x + 1 if x > 2 a) Find the piecewise function f (x) = - 2X - 3 if x 2 2 b) Find f(0), f(2), f(-2) f ( 0 ) = f ( 2) = f ( - 2 ) =