Problem $08\mathrm{.}042-$ Determine principal and maximum shearing stresses for a beam with circular cross section under axial, bending and transverse loading

The steel pipe $AB$ has a $72-mm$ outer diameter and a $5-mm$ wall thickness. Knowing that the arm CDE is rigidly attached to the pipe and $R=2\mathrm{.}8kN,$ determine the principal stresses, principal planes, and the maximum shearing stress at point $H.($Round the final answers to two decimal places.$)$

The principal stresses at point $H$ are

${}_a=,MPa$

${}_b=,MPa$

The principal planes at point $H$ are

${}_a=,$

${}_b=,$

The maximum shearing stress at point $H$ is $$ MPa $.$