Additional Problem $4$:

The C$-$clamp shown below has been tightened until a force $($ P and $\backslash (\backslash$mathrm$\{$P$\}^\{\backslash$prime$\}\backslash ))$ of $420$ N is exerted on the clamp. Calculate the following for that condition: a$)$ normal stress at point A $,$ b$)$ normal stress at point $\backslash ($ B$,$ c $\backslash ))$ the location of the neutral axis for the cross$-$section shown. Answers are $($Normal at A$=49\mathrm{.}9$ MPa, Normal at B$=-51\mathrm{.}9$ Mpa$).$ PLZ HELP