QUESTION $3$

$3\mathrm{.}1$ Redraw the basic closed control loop block diagram below, and show which parts represents the manipulative variable $($MV$),$ controlled variable $($PV$),$ sensor$,$ error and set point $($SP$).$

$(6)$

Figure $2$: Block diagram of closed control loop

$3$

$3\mathrm{.}2$ Discuss what is the function of each of the above$-$mentioned basic components in a control loop.

$(12)$