Solve and do diagrams

A pipe strut $BC$ is loaded and supported as shown. The strut has a uniform cross section and a mass

of $50$ kg $.$ Determine the tension in the cable and the reaction at support $C.$

Calculate the force and moment reactions at the bolted base $O$ of the overhead traffic$-$signal

assembly. Each traffic signal has a mass of $40$ kg $,$ while the masses of members OC and AC are $50$ kg

and $55$ kg $,$ respectively. The mass center of member AC is at G $.$