b$)$ The rectangular plane frame shown in Figure Q$4\mathrm{.}3$ is loaded by a $35$ kN force in the

positive x$-$direction at point $C.$

Figure Q$4\mathrm{.}3$

$($i$)$ Sketch the FBD and calculate the reactions.

$[3$ Marks$]$

$($ii$)$ Using the method of sections compute the forces in the bars AC and BC and

state whether each of these are in tension or compression.