How are these numbers calculated?

Big Games

How we did yesterday and who we should root for today.   Explain

Thursday, 3/23100.0*Chance in playoffs100.0*Average seed
RS 4 SPA 19 -10.5
-0.3
If winner is:HomeTieAway
Monday, 4/3100.0*Chance in playoffs100.0*Average seed
RS vs OS+20.2+4.4-20.5
+0.4+0.1-0.4
RS vs HA+22.5+12.7-2.0
+0.5+0.3-0.0
HA vs OS+0.7-5.2-7.1
+0.0-0.1-0.2

What If

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

100100100100100100
If finish:Chance inChance will finish regular season at seed
TPW-L-Tplayoffs123456Count
125-0-0In02369867,291
114-0-1In2653328,798
104-1-099.9%036640920,612
3-0-299.90336707,824
93-1-199.5016840471,488
2-0-399.812880881
83-2-093.80490607,114,002
2-1-293.43917077,724
1-0-491.191945
72-2-184.90851502,251,907
1-1-381.30811805,026
62-3-050.205046421,419,365
1-2-242.342525207,595
0-1-424.6256412118
51-3-122.92360173,756,321
0-2-37.2766275,772
41-4-02.63356224,999,149
0-3-2Out2674151,266
30-4-1Out21791,947,952
20-5-0Out1009,861,508
Total:30.7%00130303973,294,644
Games Above .500
Chance Will Make Playoffs