Answer:
Yes, this pratice is ethical
Explanation:
You are freely choosing to go on to these websites and most websites inform you that they are doing this. Edward Snowden, told the world that goverments are spying on them. Most people did not have a problem with this. Since, most people have a way to inform themsevles about the practices on the websites(by reading the terms of serve) and people don't care about spying than this is in no way unethical practice.
Answer:
Communication path basically define the path in which the information and messages can be exchange by using the efficient communication path.
There are simple formula for calculating the total number of communication channel that is :

Where, n is the number of stack holder.
Now, the maximum number of communication paths for a team of twenty people can be calculated as:
n=20
=\frac{20(20-1)}{2} = 190
Therefore, 190 is the total number of communication path.
C. hard skills as they are well defined and thus can be listed down on something like a resume or cv