Logic Problem
The answer is:
- Q.T. Clemens is the janitor who gave 10 thread spools.
- William Lindros is the postal worker who gave 21 thread spools.
- George Smith is the engineer who gave 1 thread spools.
- Sean O'Neal is the graphic artist who gave 0 thread spools.
- Ken Zellar is the xylophone player who gave 16 thread spools.