A structure is attached to a fixed surface at its bottom O, as shown in the figure below. The length of section BC is 1.5L and the length of section CD is L. Both BC and CD have radii of r, with L=20r. The end D is acted upon by a pair of forces P and 2P in the negative r direction and the negative z direction, respectively. It is desired to understand the states of stress at points "a" and "b" at B. a) Determine the internal resultants at location B. Keep answers in tabular format in terms of P and r. b) Identify the components of stress for each of the internal loads at locations "a" and "b" on the cross section of the cut. Keep answers in terms of P and r. c) Determine the states of stress at locations "a" and "b". Keep answers in terms of P and r. On stress elements, show the directions of the components of stress and their magnitudes.

1.51 end view stress state ( stress state @"b"