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 -16.1
-0.5
If winner is:HomeTieAway
Monday, 4/3100.0*Chance in playoffs100.0*Average seed
RS vs OS+18.5+0.8-18.5
+0.5+0.0-0.5
RS vs HA+11.3+1.1-11.3
+0.3+0.0-0.3
HA vs OS+3.2-0.4-3.2
+0.1-0.0-0.1

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
125-0-0In549423609,179
114-0-1100.0%01462240157,676
104-1-096.6044251302,999,975
3-0-297.6341532016,518
93-1-183.301470160629,666
2-0-386.4127414826
83-2-046.503444865,994,577
2-1-244.824349649,895
1-0-439.339501128
72-2-122.20225621946,309
1-1-320.602056241,744
0-0-5Out1001
62-3-05.50541545,992,465
1-2-23.13395849,692
0-1-4Out336727
51-3-10.812475630,252
0-2-30.301683880
41-4-00.006942,996,449
0-3-2Out49616,598
30-4-1Out397157,577
20-5-0Out100608,410
Total:34.6%02924293621,858,744
Games Above .500
Chance Will Make Playoffs