$1\mathrm{.}74.$ At a point in a loaded body, the stresses relative to an $x,y,z$ coordinate system are

$\left[\begin{array}{ccc}40& 40& 30\\ 40& 20& 0\\ 30& 0& 20\end{array}\right]$MPa

Determine the normal stress $$ and the shearing stress $$ on a plane whose outward normal is oriented at angles of $40,75,$ and $54$ with the $x,y,$ and $z$ axes, respectively.