For the circuit shown in Fig. 4.26

(a). Write the Boolean functions for the four outputs in terms of the input variables.

(b). If the circuit is described in a truth table, how many rows and columns would there be in the table?

Ao A A A3 B B- B3 S (select) 288 E (enable) FIGURE 4.26 Quadruple two-to-one-line multiplexer Section 4.11 Multiplexers 185 D-Yo D-Y D-Y Output Y X all 0's 0 select A 1 select B Function table E 1 0 0 S o multiplexer