SOLVE WITH P as $-150$

A single horizontal force P with a magnitude of $-150$ lb is applied to end

D of lever ABD. Knowing that portion AB of the lever has a diameter of

$1\mathrm{.}2$ in $.,$ determine $($a$)$ the normal and shearing stresses located at point H

and having sides parallel to the x and y axes, $($b$)$ the principal planes and

principal stresses at point H$.$