(a) Describe the behaviour of positive and negative charges within a p-n junction.Use a sketch/sketches (drawn by hand) to support your description. (b) Show your knowledge and understanding of the actions involved with thefollowing devices; A diode A bipolar transisto rA MOSFET OUse semiconductor theory to describe the movement of charge carriers in each of the three devices given in Task (b). For each of the devices given in Task (b) make a judgement about their performance limitations. Also give a typical application for each of the devices.