Problem 04.128 - Unsymmetric bending of a rectangular cross section The couple M = 410 lb-in. is applied to a beam of the cross section shown in a plane forming an angle ẞ with the vertical. Determine the stress at points A, B, and D. (Round the final answer to two decimal places.) B = 30° 0.6 in. 0.6 in. A B M C 0.4 in. D The stress at point A is ksi. The stress at point B is ksi. The stress at point D is ksi.