What is the author’s purpose in mentioning that there are no airplanes flying over Fairbanks and that cars are parked in the Newsela article "50 Below is Quite Cold, Even for Alaska"?to persuade Alaskans to walk to their destinations when ableto describe how the cold weather affects transportation in Alaskato explain how hard it is to travel throughout Alaskato inform readers about the distance between Fairbanks and other cities