Two vertical forces are applied to a beam of the cross section shown: a) [9 points] Determine the distance from the top surface to the neutral axis, c. b) [9 points] Determine the moment of inertia about z-axis, Iz. 1 = c) [7 points] The bending moment at the segment BC is 600 k-in. Determine the maximum tensile stress, Omax. ? Omax Z y 15 kips A B 2.in. 2 in. 2 in. | | 40 in. -60 in.. 6 in. C 2 in. 15 kips 40 in. D