a. Draw the noise model of a C.E. amplifier. Indicate if every noise source thermal or shot?. If the noise figure is expressed in the form: F= A + B/Rs + C. Rs, what will be the optimum source resistance using this model? Explain what the coefficients A, B, and C depend on, and how it can be altered? a. Draw the noise model of a C.E. amplifier. Indicate if every noise source thermal or shot?. If the noise figure is expressed in the form: F= A + B/Rs + C. Rs, what will be the optimum source resistance using this model? Explain what the coefficients A, B, and C depend on, and how it can be altered