Question $1$: Figure $1$ shows the temperature control of a polymerization reactor.

$($a$)$ What control system type has been used in this process?

$($b$)$ What is your recommendation for the valve$-$safe position $($explain your reason$($s$)),$ and then what are both controllers' actions?

$($c$)$ Explain the control strategy if the feed temperature becomes too high.

r