19 A multiplexer is used to accept data from many input sources for transmission over a common shared line as shown in Figure B19. MP3 Laptop Sound MUX H:10 Bon Bondye Cyta w Balle TV Figure B19 i) If A=0, B=0, which of the inputs is present in the output Y?. [0.5) ii) What must be the value for A and B so that Digital Satellite will be selected? [0.5) iii) Construct the truth table, write the logic function and draw the logic diagram of the given [4] multiplexer 20 For the given Boolean expression E = ABCD + ABCD + ABCD + ABCD 1) Evaluate the simplified expression by constructing K-Map ii) Build the truth table for the given logic expression. [2.5] [2.5]