You and your team of engineers are designing a pedestrian bridge for a mall. You must Select a material for the main beam, which has a cross section of 4 inches (in) by 4 in. It 10 ft long and must support loads up to 2.500 pounds (lb), and must not Geflect more than 2 To analyze forces on the beam, you draw a free body diagram. The beam has a pin at the left end and roller at right end .One person stands at the right end of the beam