Complete P$1\mathrm{.}4\mathrm{.}4$ in the textbook.

For each control loop in the problem,

$1.$ identify the controlled variable $($a$)$ as a process parameter of interest to a chemical engineer, and $($b$)$ as the controller sees it$\mathrm{.}2.$Identify the manipulated variable $($a$)$ as a process parameter of interest to a chemical engineer, and $($b$)$ as the controller sees it$.$