A fruit processing company wants to install an apple processing plant in Quetta. Company required the design of a system to pack four apples in a box but the apples vary in sizes. For simplicity an...

A fruit processing company wants to install an apple processing plant in Quetta. Company required the design of a system to pack four apples in a box but the apples vary in sizes. For simplicity an apple is characterized as ‘Big’ or ‘Small’ with logic ‘1’ and logic ‘0’ respectively. In this way there will be four categories of boxes so, a color label should be placed on each box to distinguish different boxes. The boxes should be labeled using following rule,

• If all four apples are small, the box should be labeled red


• If only two apples are small, the box should be labeled blue


• If only one apples is big, the box should be labeled green


• If all four apples are big, the box should be labeled yellow


• If only three apples are found big, the box should be labeled with both red and yellow.

1. List the truth table.


2. Draw the circuit diagram of system using decoder.