Chapter 4: (Screenshots attached)

Please answer numbered question (s) in writing for chapter 4 below. Responses must include detailed information to cover the material

You and your best friend are planning a trip.  You meet to discuss choosing what countries to visit. Your friend is concerned about safety, particularly getting murdered. Based on crime data collection by various agencies around the world, what detailed information would you tell your friend regarding the difficulties in making international crime rate comparisons?