1. A coin-operated cold drink dispenser will provide cold drink (D) under the following conditions:

The correct coin (C) is inserted AND

A paper cup is in position (P) AND

The selector is set to Orange (O) OR Sprite (S) OR Lemonade (L)

I. Write the Boolean expression for the output of the dispenser. [6marks]

II. Represent the operation of the dispenser in logic circuit [6marks]

2. Simplify the given expression to its SOP form. Draw the logic circuit for the simplified SOP function. [8marks]

G = ( +B) + CBA + ( +A)C(B+A) + B

3. Design a device that will change serial data to parallel data, Use the design procedure for digital systems [8marks]

4. Show that ( +A)(Y )( +AY+A) = 0 [6marks]

5. a) Write the ASCII 7 coding for the word GIRL in both binary and hexadecimal notations. [6marks] b) How many bytes are required to store this word using this coding [6marks]