The tube has an outside diameter of 3.9 in ., a wall thickness of 0.11 in ., and length dimensions of a=17in. and b=9in. The load
magnitudes are P_(x)=940lb,P_(y)=470lb, and P_(z)=610lb. Determine the principal stresses on the underside of the tube at point H, and
show these results on a properly oriented stress element.