How are these numbers calculated?

Big Games

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

If winner is:HomeAway
Week of 10/2100.0*Chance in playoffs100.0*Average seed
Velma Jackson vs East Side+13.5-18.1
+0.6-0.8
Humphreys County vs Ruleville Central-0.5+0.6
If winner is:HomeAway
Week of 10/9100.0*Chance in playoffs100.0*Average seed
Elzy vs Velma Jackson-13.7+18.3
-0.6+0.8
Ruleville Central vs Yazoo County-0.1+0.1
East Side vs Humphreys County+0.1-0.1

What If

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

100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs123456Count
55-0In10030,967,631
44-1In71281167,748,068
33-299.8%93941110363,104,521
22-352.201141399385,358,104
11-41.012871200,196,945
00-5Out10041,197,983
Total:64.3%1516161717181,188,573,252
Games Above .500
Chance Will Make Playoffs