can you solve those three questions in CONTROLS ?

Control Explain the difference between a proportional controller and a bang-bang (ON-OFF) controller. Explain how you would tune a PID controller used to control the oil flow rate in an oil refinery. You implemented a PID controller for a Lasik eye surgery laser beam system. The laser responds well, with minimal oscillations; however, it burns the cheek rather than fixes the eye. What gain(s) should be adjusted in the PID controller? Should the gain(s) be increased or decreased? Explain your reasoning