There are two trails near leslie's house that she runs regularly, a short loop and a long loop. last week, she ran 6 short loops and 2 long loops, for a total of 44 kilometers. this week, she ran 6 short loops and 6 long loops, covering a total of 72 kilometers. what is the length of each loop? the short loop has a length of ? kilometers, and the long loop has a length of ? kilometers.