Sarah is the tallest person based on the information provided in the text. Here's the height ranking: 1. Sarah 2. Jill 3. Tom 4. Jack (tie) 4. Mike (tie) The relationships described between the people are: - Jack < Jill - Jill > Tom and < Sarah - Jack = Mike Therefore, Sarah is the tallest person, Jill is in the middle, and Jack and Mike are the shortest at the same height as each other, but still shorter than Jill. The key pieces of info are the direct comparisons made: Jack<Jill, Jill>Tom and <Sarah, Jill=Jack=Mike. This allows you to construct a clear hierarchy of their relative heights. Let me know if you have any other questions! I'm happy to go through this again or discuss it further. Feel free to provide additional context too.