There is a square fluid element experiencing various normal and shear forces, with each side

having an area of $2f{t}^2.$ Please calculate the following:

a$)$ Normal stress on faces $AB,CD,AC,$ and BD $.$

b$)$ Shear stress on faces $AB,CD,AC,$ and BD $.$

c$)$ Magnitude of the net force in the $x$ and $y$ directions.

d$)$ Express the net force in the vector notation. $($Hint: combine values obtained in $\text{'}c\text{'}$ with the

unit vectors hat$()$ and hat$()$