1.) Explain the basic operation of a solar cell including the short circuit current and the open circuit voltage. 2.) The (net) current in a solar cell can only go in one direction. Explain which direction is correct (in the direction of forward or reverse bias current). Relatedly, which of the two currents (the photocurrent or the forward bias diode current) is always larger in a solar cell? 3.) Discuss the basic operation of a photodetector and an LED. Does each device rely on generation or recombination of electron pairs? If it's generation, explain what happens to the pair after they are created. If it's recombination, explain where the electron/holes originated and what happens to them after they recombine