How are these numbers calculated?

Big Games

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

Week of 12/27100.0*Chance in playoffs100.0*Average seed
Bellport 61 Riverhead 64 -6.5
-2.0
Mt. Sinai 68 Sachem East 58 +0.3
+0.1
ESM 47 Smithtown East 57 -0.3
-0.1
Sachem North 53 BBP 62 +0.2
Northport 75 HHH West 69 -0.1
Comsewogue 64 Lindenhurst 65 +0.1
Riverhead 58 Southampton 62 +0.1
Smithtown East 72 Floyd 44 -0.1

What If

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

100100100100100100100100100100100100100100100100100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TWW-Lplayoffs12345678910111213141516171819202122232425262728Count
95-0In35451720017,286
84-1In162133261130086,558
73-2In0015152728176100172,428
62-3100.0%0018213025113000173,040
51-426.0001718292714410085,890
40-5Out01619312713310017,512
Total:85.3%124566996479842344211100000552,714
Games Above .500
Chance Will Make Playoffs