Is team is very successful. John's employees share information with one another, they ask
for help when they need it, and they are focused on customer satisfaction
John is likely demonstrating what kind of traits as a manager?

John as a manager exhibited various traits such as encouragement, open-mindedness, transparency, compassion, excellent communication skills etc.

Explanation:

A manager is a person who is in charge and responsible for their team comprised of other employees working at the same time or place. They lead them and give them a vision to work on.

They highlight their own flaws and at the same time appreciates when a team member excels at work.  

Similarly, a manager should not gossip, show favoritism, make criticism without explanation etc. These bad qualities can ruin the environment of any office leading to multiple problems.

answer; comparing the additional benefits and costs;