good job! trying is where it counts. But about the miles and times...1.5 miles walking...is good in 15-20 minutes. But it's impossible to run 7 miles in 7-10 minutes. Normally, one mile, for somebody fast takes 8 or so minutes. But can take like 6 or so. For fast people. So, 7 miles would take longer. sorry...too much math. ;-)