2+5+8+1=16
16/4=4
4 is the average (mean)
Explanation:
12: life line for commoners
13.started riot, especially
14.unfaur taxation, voting issues, unequal lang, estates gets all the votes, 1st and 2nd estates more votes than 3rd estates.
15. most of the population who were the 3rd estates (97%) treated people poorly with high taxes and decided to revolt
Mechanical problems since they can be solved and have the second most deaths. I would have the plane go through at least 3 examinations before boarding then one passenger exam before takeoff.
The answer to this is eukaryotic