Hi, thank you for posting your query here in Brainly.
All you have to do is understand each information clearly and write it down to help you picture out the problem. After doing so, you will find that the correct order of people in the line is
Frank -> Betty -> Mark -> Mary -> Andy -> Chris
Hence, Mary is situated between Mark and Andy, and is fourth in the line.
It makes your speech more meaningful
Failure, a malfunction is something this isn’t working or isn’t working properly, it is FAILING to work
Answer:
the author outlines events chronologically to give a complete account of the United States entering world war 1