How are these numbers calculated?

Big Games

How we did last week and who we should root for this week.   Explain

Week of 1/25100.0*Chance in playoffs100.0*Average seed
Nick 128 Birk 160.5 -3.8
-0.7
Walsh 150 Nick 168 +3.5
+0.4
David 196 Jacob 182.5 -1.1
David 132.5 Brent 126.5 -0.4
-0.1
Adam 159.5 Jacob 154.5 +0.2
+0.2
Micah 175.5 Birk 158.5 -0.1
Walsh 124.5 Micah 178 -0.1
-0.0
Brent 161 Adam 149.5 -0.1
Week of 2/1100.0*Chance in playoffs100.0*Average seed
Brent 5 Micah 2 +1.0
+0.1
If winner is:HomeAway
Brent vs Nick-21.5+16.4
-0.6+0.5
David vs Birk+3.5-3.8
+0.1-0.1
Micah vs Jacob-2.3+2.3
-0.1+0.1
Bill vs Jacob-1.6+1.8
Bill vs Birk+0.8-0.9
Dosters vs Adam-0.5+1.0
Walsh vs Adam-0.7+0.8
-0.1+0.1

What If

Chances based on how well the Nick finish out the regular season.   Explain

100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TPW-OTLTplayoffs123456789101112Count
122-00086.3%001934431406,541,526
111-01015.800115768013,747,418
100-0200.2029541706,695,264
Total:29.0%000291849174026,984,208
Points
Chance Will Make Playoffs