. Sketch the E vs k diagram for a direct bandgap semiconductor from 0 to the and to the . Label the energy gap (E3). [4 points) . Sketch the E vs k diagram for an indirect bandgap semiconductor from 0 to the and to the . Label the energy gap (E3). [4 points) Answer which type of semiconductor is better for fabricating light-emitting diodes (LED), direct bandgap or indirect bandgap? Why? (2 points) . Answer: At room temperature for intrinsic samples of Si, Ge and GaAs rank them in order of decreasing conductivity. Please explain your answer in 23 sentences with the help of Fermi-Dirac distribution function. [4 points)