19 A multiplexer is used to accept data from many input sources for transmission over a common shared line as shown in Figure CI UPP Decking on Sound Care MUX Sound D Satelite SatTV Figure B19 1) When A=1, B=1, which of the inputs is present in the output Y. ii) What must be the value for A and B so that Laptop sound card will be selected? iii) Construct the truth table, write the logic function and draw the logic diagram of the giver multiplexer 20 For the given Boolean expression Y-AB.C.D.A.B.C.D.A.B.C.D.A.B.C.D.A.B.C.D.A.B.CDA.B.CD-ABCD 1) Evaluate the simplified expression by constructing K-Map ii) Build the truth table for the given logic expression