How are these numbers calculated?

Big Games

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

Week of 11/17100.0*Chance in playoffs100.0*Average seed
Kelsey 98.5 Ben 109.5 -8.0
-0.5
Forrest 88.5 Kaitlyn 62.5 +5.6
+0.1
Greg 89.5 Dan 107.5 +5.1
+0.3
Mark Sellers 141.5 Tom 72.5 -4.6
Kyle 106.5 Mark 52.5 -0.6
-0.0
Week of 11/24100.0*Chance in playoffs100.0*Average seed
Kelsey 92 Tom 109.5 -26.0
-1.3
Greg 112.5 Lisa 108 -7.7
-0.2
Mark Sellers 92.5 Kaitlyn 91.5 -1.3
-0.1
Forrest 120.5 Dan 102 +0.3
Doug 96.5 Mark 45 +0.1
-0.0
Kyle 112.5 Ben 100.5 -0.1
If winner is:HomeAway
Week of 12/1100.0*Chance in playoffs100.0*Average seed
Mark vs Greg+38.8-5.4
+0.5-0.1
Dan vs Mark Sellers+27.8-11.5
+0.3-0.1
Kaitlyn vs KelseyOut+13.8
-1.3+1.0
Lisa vs Forrest-5.8+3.2
-0.1+0.0
Tom vs Kyle+3.2-2.0

What If

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

100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-L-Tplayoffs123456789101112Count
71-0-032.2%3296828,689,077
60-1-0Out10021,450,331
Total:18.4%217394350,139,408
Games Above .500
Chance Will Make Playoffs