$10.$Hidden lines are used exclusively for representing features on the interior of an object. A$)$ TRUE B$)$ FALSE$11.$ The CPU of computer controls the input and output devices in addition to running the CAD software. A$)$ TRUE B$)$ FALSE$12.$ CAD stands for computer$-$automated design. A$)$ TRUE B$)$ FALSE$13.$ Construction lines are the only lines on a drawing which should be light. A$)$ TRUE B$)$ FALSE