Professor Smith computes grades as follows: He uses only the first digit (that is, 9 for averages between 90 and 99). He never has an average of 100. He gives a P (pass) to anyone with an average of 60 or above and an F to anyone with an average below 60. The inputs are w, x, y, and z. Design a circuit using up to two of the decoders with active high outputs and an active low enable shown below, one NOT gate, and one OR gate to produce an output of 1 if the student pass