Real bar code systems are more complex than the one we sketched in the book. They must be able to encode all ten digits, for example. There are several industry-standard formats for bar codes, including the common UPC code found on nearly everything we buy. Search the web. Find the encoding scheme used for UPC codes. Describe a finite state transducer that reads the bars and outputs the corresponding decimal number. You do not need to write out every state. Show some at the beginning. Then describe, in English, the structure of the rest of the machine.