$3\mathrm{.}1$ Figure $3\mathrm{.}1$ is a digital $($numerical$)$ relay structure. Name the components numbered $1,2,8,7,13,10,$ and $3,$ and state their functions.

Figure $3\mathrm{.}1$: Digital $($numerical$)$ relay structure

Draw a fully labelled frequency logic.

Draw a timer logic with its timing diagrams.