How are these numbers calculated?

Big Games

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

Week of 11/20100.0*Average seed
Keating 85.7 Petrella 132.6 +0.3
Crump 110.8 Shroff 119.6 -0.2
Del Cueto 107.9 Swords 116.1 -0.1
If winner is:HomeAway
Week of 11/27100.0*Average seed
Petrella vs Swikart+0.3-0.3
Shroff vs Swords-0.1+0.1

What If

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

100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs123456Count
72-0Out88123,376,629
61-1Out2159216,742,466
50-2Out13873,378,033
Total:Out32363213,497,128
Games Above .500
Chance Will Make Playoffs