8 mile Tempo with pace 7:40

Overslept today. It was 6am when I woke up, I setup the alarm
clock wrong. So I skipped the group wrong.

I figured out that I need to run a little bit faster for the tempo
or strength workout if I ran myself. Otherwise, I had the difficulty
to increase my speed later on. So I did for this morning run.

Warm up for one mile, then 8 mile tempo, and 2 miles cool down.
The problem now is that 1)Do I need to drink water in between?
2)Need a GEL? or 7:40 pace is good enough for Marathon?
Do I need to increase to 9, 10, .. 14 miles?

Split	Time	Distance	Avg Pace
Summary	1:27:38.0	11.00	7:58
1	8:27.5	1.00	8:28
2	7:26.7	1.00	7:27
3	7:34.9	1.00	7:35
4	7:33.9	1.00	7:34
5	7:40.5	1.00	7:41
6	7:40.1	1.00	7:40
7	7:35.8	1.00	7:36
8	7:40.6	1.00	7:41
9	7:37.6	1.00	7:38
10	9:14.8	1.00	9:15
11	9:05.8	1.00	9:06