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A group of friends is represented by the graph below. An edge connecting two names means that the two friends have chat to each other

A group of friends is represented by the graph below.  An edge connecting two names means that the two friends have chat to each other in the last week.
 
Have John and Stacy chatted to each other in the last week?
How many of the friends in this group has Steve talked to in the last week?
Among this group of friends, who has chatted to the most people in the last week?

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