37 minutes for 5 miles is the average time
13.11 MPH
A pace of no less than 7:15 per mile.
The pace would be 6.32 miles per hour.
Taking 60 minutes (one hour) you divide by 7 = 8.5714 miles per hour. If he kept that pace for a marathon, he would complete the marathon in 2 hours and 48 minutes. Not world class, but a very good time for an amateur.
For your first half marathon, probably 10-13 minutes per mile, or if you are walking a little bit too, 13-16 minutes per mile. If you are a super amazing runner and/or have run a half-marathon before, then the sky's the limit.
A 4 minute 50 second mile is a pace of 12.41 miles per hour.
A 13-minute mile requires a pace of at least 4.62 miles per hour.
Your pace is 8.6 miles per hour.
The pace must be at least 8.6 miles per hour.
A 3-minute 43.13 second mile equates to a pace of 16.13 miles per hour.
You would have to keep an average pace of about 12mph (that is, miles per hour) to finish the mile in 5 minutes
60 (minutes/hour) / 9.5 (minutes/ mile) = 6.316 miles per hour