An l-shaped bracket lying in a horizontal plane supports a load p 5 150 lb (see gure). the bracket has a hollow rectangular cross section with thickness t 5 0.125 in. and outer dimensions b 5 2.0 in. and h 5 3.5 in. the centerline lengths of the arms are 5 20 in. 1b and b 5 30 in. 2 considering only the load p, calculate the maximum tensile stress s t , maximum compressive stress s c, and maximum shear stress t max at point a, which is located on the top of the bracket at the support.