1. Which output will be selected on the Mux of the following circuit if the selected line is 0: 0 MUX 0 0 B ac b. c Xerb c. c'+c Xar b d. non of the above 2. A 1-minute counter that counts from 0 to 63: a. Requires 64 flip-flops b. Requires 5 flip-flops c. Requires 6 flip-flops d. Can be designed only using combinational circuits. 3.The boolean function realized by the logic circuit with SO and Si control lines is: so $1 B 0 4xl MUX 6 1 Y F + 1 a. A'B'D+A'BC'D'+AB'CD +AB b. ABD+AB'C'D+A'BCD+A'B' c. A'BD+A'B'C'D+ABCD+A'B' d. non of the above