.6 Consider the air-heating system used to regulate the temperature in a house (Figure PI.4). The heat is supplied from the combustion of fuel oil. (a) Identify the control objectives, the available measurements, and manipulated variables. What are the external disturbances for such a system? Is this a SISO system? (b) Develop a feedback control configuration to achieve your control objectives. (c) Is a feedforward control configuration possible for achieving your control objectives? Figure PI.4