$1\mathrm{.}3$ As we know we can express the stress tensor as $={}_{ij}{e}_i{e}_j$ and so$,$ can you verify from

what to did above that the shear stress component ${}_{ns}=n**s?$

Hint $8$ help: Recall the traction vector on a surface with unit normal $n$ was derived as

$T=n*$

So$,....$ why not use a package such as MATLAB to verify your answer for $T$ by creating a

matrix for $,$ a vector for $n,$ and then computing $T=n***$; but make sure when you use

MATLAB, you enter $n$ consistent with the above equation $-$ i$.$e$.$ should you enter $n$ or $n^{\text{'}}?$