design rectangular sections for the beams, loads, and p values shown. Beam weights are not included in the loads shown. Show sketches of cross sections, including bar sizes, arrangement, and spacing. Assume concrete weighs 150 lb/ft, f, = 60,000 psi, and f = 4000 psi, unless given otherwise. P= 20 k wp=2 k/ft ///////// -12 ft Use p = Pb k