Pulleys and block-and-tackles are often used to hoist objects into the upper levels of barns and garages. The supports that hold these contraptions come in various forms. Let us model the illustrated orange support as a planar truss with horizontal member that is subjected to the vertical tension load . Given the following: 90 N cm cm determine forces , , and in N in members , and . Matlab input: T = 90; AB = 100; AC = 140; theta = 15; N N N