4-8) a. Determine the maximum shear stress due to torsion in the steel shaft shown in Figure P4.8. (b) Determine the maximum tensile stress due to bending in the steel shaft shown above. 4-9 Consider the circular bent rod with diameter 20 mm shown in Figure P4.9. The free-end of the bend is subjected to 400 mm 4-10) Determi moment diagr location and r 4.11. A bar c at one end as mm. The rer is 300 mm in subjected to the bar. Tak 4.12. Two ends to a h have the sa B 100 mm 300 mm al C izontal cro ends of the the locatio horizontal steel and EAL = 71 4-13. De shaft sho 200 mm 300 lb D 400 N 800 N Figu Shaf Figure P4.9s boot Circular bent rod.