A man with his tools having a total weight W = 1.012 kN, steps on the retractable ladder. The ladder is supported by cables and two arms. If each arm carries half of the weight, what is the internal...

Extracted text: A man with his tools having a total weight W = 1.012 kN, steps on the retractable ladder. The ladder is supported by cables and two arms. If each arm carries half of the weight, what is the internal bending moment in the arm at the indicated cross-section S? Take h = 540 mm, l1 = 365 mm, l2 = 286 mm, and l3 = 761 mm. Cables- Arms 1000 mim W/2