Homework Answers
Truth Table of 
| A | B | |
| T | T | T |
| T | F | F |
| F | T | T |
| F | F | T |
Problem solution is
| A | B | A' | B' |  |
 |
 |
 |
| T | T | F | F | F | F | T | T |
| T | F | F | T | T | F | T | T |
| F | T | T | F | F | T | T | T |
| F | F | T | T | F | F | F | F |
This is not a tautology. Proved through the last column
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