Three forces act on the bracket as shown in Figure $3$:

Figure $3$

a$)$ Find the magnitude and direction of F so that the resultant force is direct along the positive x$-$axis and has a magnitude of $8$ kN $.$

b$)$ If $F=5kN$ and $u=30,$ find the magnitude of the resultant force and its direction, measured$-$counter$-$clockwise from the positive $x-$axis.