Feedforward and feedback control is a common control strategy widely used in process control applications (i) Define feedforward and feedback control with supported diagram (ii) (4 marks) Give ONE (1) advantages and disadvantages of applying feedforward and feedback control strategy in process control. (4 marks) The following are the automatic control system commonly encountered in daily life. 1. House air conditioning 2. Cooking oven 3. Refrigerator (i) Identify the devices that perform the measurement (M), decision (D), and action (A) functions. (9 marks) (ii) Classify the action (A) function as "On/Off" or "Regulating". (3 marks) A closed control loop exists where a process variable is measured, compared to a set point, and action is taken to correct any deviation from set point. (i) Under what circumstances does an open control loop exist? (ii) Describe an example of appliance where open control loop is used. (6 marks)