Alisha has agreed to send Khushi a 20-megabyte file. They both have a broadband Internet connection. Alisha has to upload her file to a server and then Khushi needs to download it from the same server. The broadband data transfer rates (speeds) are: 1 megabit per second to upload a file and 8 megabits per second to download a file. If P and Q represent the time taken in seconds to upload and download Alisha's file respectively then (P, Q) =