A company conducted an online test as part of its hiring process. The test completion times (in minutes) for 8 candidates are given below:
48, 52, 49, 50, 60, 47, 46, 53
To shortlist candidates for further rounds, the company decides to eliminate the slowest 80\% and retain only the top 20\% fastest candidates based on their test completion time. What is the maximum test completion time (in minutes) a candidate can have to be in the top 20\% fastest group?