A heat exchanger is used to increase the temperature of a process fluid and steam is passed through this system for heating. In this system, by configuring the system according to the control systems (feedback and feedforward) used to bring the fluid to the desired temperature and keep it at that temperature (it should be drawn separately for both control systems), what can be the adjusted variables used to keep the controlled variable on the system under control. show me Explain the relationship between these variables on these systems and talk about how the systems can take corrective measures against possible disturbances.