Consider the pipe segment $AB$ that lies in the $xz-$plane. The pipe is bent in a circular form with a radius of $4\mathrm{.}9m.$ The pipe is supported at $A$ by an unknown support and at $B$ with a cable $BC.$

The system is subjected to a loading that is NOT shown.

Let $F$ denote the tension in cable $BC$ and consider the force $\frac{?}{\text{b}\text{a}\text{r}}(F)$ as in the sketch that the cable exerts on the point $B$ of the pipe.

Answer the following questions.

a$)$

Calculate cartesian vector moment $\frac{?}{\text{b}\text{a}\text{r}}(M)$ of force $\frac{?}{\text{b}\text{a}\text{r}}(F)$ about point $A.$

$\frac{?}{\text{b}\text{a}\text{r}}(M)\frac{?}{b}=ar(i)+\frac{,}{b}ar(j)\frac{+}{b}ar(k)$