5.23 For a stirred-tank heater, assume the transfer function between the heater input change u(t) (cal/sec) and the tank temperature change y(t)(C) can be modeled as G(s)=3s+15 (a) Using the Final Value Theorem, find the steady-state response for a unit rectangular pulse change in the heating rate(U(s)=s1es) (b) Repeat the calculation in (a) for a unit ramp (U(s)=s21). (c) For both cases (a) and (b), explain your answer physically. Is there a physical limitation on the ramping of the heating rate