The 2014 domestic postage rate for first-class letters weighing 3.5 oz or less is 49 cents for th P as a piecewise defined function of the weight x of a letter, with 0 < x < 3.5. (Express your a if 0 < x 1 if 1 < x 2 P(x) = if 2 < x 3 if 3 < x < 3.5 Sketch a graph of this function. 1.20 P 1.00 0.80 1.20 1.00 0.80