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 2 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 student pass.

Write the truth table