As shown in Fig. 4, the circuit has a 4-input priority encoder connected to a 2-to-4 decoder with high enable. The truth table for the priority encoder is given. (The I3 input is highest priority.)...

As shown in Fig. 4, the circuit has a 4-input priority encoder connected to a 2-to-4 decoder with high enable. The truth table for the priority encoder is given. (The I3 input is highest priority.) All signals are active high. What functions of A, B, C, and D are realized by Z3, Z2, Z1, and Z0? (Show steps, such as truth table)

Extracted text: Z3 S 2-to-4 Z2 I3 1½ 4 L |G Y, Yo 0 0 0 0 0 0 0 1 0 0 1 0 1 1 Y 13 Yo 2 Priority A 0 0 0 100 10 1 1 1 0 1 1 1 Decoder z, So C- Encoder E D. G (a) (b)