Wireshark capture query

Hello,

 I have some questions regarding packet capture report that I have generated using wireshark.

(Q1) How can I determine the different types of protocols captured and the different levels of communications using Conversations?

(Q2) How can I determine from my wireshark capture (where do I look) if there are any unexpected conversations?

(Q3) How can I determine from my wireshark capture which device my computer "talk" to the most?

(Q4) How can I determine from wireshark capture the most frequent type of packets captured?

(Q5) How can I determine from my wireshark capture if the traffic was constant?

Please help.

Irene