The following dot plot shows how far Peter ran in each of his tennis matches this year. A number line labeled Distance ran in each match is labeled from left to right 1 through 7 scaling by ones. The number line is labeled Distance in kilometers. The dot distribution is as follows: 3, 1; 4, 2; 5, 4; 7, 2. \[1\] \[2\] \[3\] \[4\] \[5\] \[6\] \[7\] Find the median distance. \[\text{ km}\]