5. Prove or disprove that the following 2 expressions are equivalent. Use either the related laws for your proof, or complete the two truth tables:

(A + C)(AD + AD) + AC + C

A + C

6. The following is a message coded in ASCII using one byte per character and then represented in hexadecimal notation. What is the message?

4469736372657465204D617468656D617469637320697320434F4F4C21

7. Convert each of the following signed binary byte representations to its equivalent base-ten representation. What would each byte represent in Binary Coded Decimal? Show your work step by step.

00010001

01011100

1111010

What is the signed binary sum of 1011100 and 1110101 in decimal? Show all of your work.

8. Convert each of the following base-ten representations to its equivalent twos complement in 7 bits. Show all of your work.

12

-2

-8

0

Define the highest and lowest integer that can be represented in this 7-bit twos complement representation.

9. What bit patterns are represented by the following hexadecimal notations? Show all of your work.

9A88

4AF6

DA

What is the hexadecimal sum of 9A88 and 4AF6 in hexadecimal and decimal? Show all of your work.