$[1]$ The rectangular plate is welded at comer $A$ to the

vertical shaft and braced by cable BC$.$ The tension in the

cable is $5$ kN $.($a$)$ Determine the components parallel to

the edges of the plate of the force the cable applies to the

plate. $($b$)$ Determine the moment about comer A of the

force applied by the cable. $($c$)$ Determine the moment

about the axis of the shaft of the force applied by the

cable.