How are these numbers calculated?

Big Games

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

Week of 5/28100.0*Chance in playoffs100.0*World Cup Qualifying100.0*Average seed
Tahiti 4 Samoa 0 +25.5
+19.7
+1.4
Papua New Guinea 1 New Caledonia 1 +0.5
-0.5
Vanuatu 0 Solomon Islands 1 -0.1
-0.2
-0.0
New Zealand 3 Fiji 1 -0.1
-0.2
-0.0
Vanuatu 0 New Zealand 5 -0.1
+1.1
-0.1
If winner is:HomeTieAway
Papua New Guinea vs Tahiti-25.6+2.4+24.6
-10.7YesYes
-1.3+0.1+1.3
New Caledonia vs Samoa-1.4+1.0+0.9
+2.9+1.5-3.5
-0.0+0.2-0.0
Solomon Islands vs Fiji+0.3+0.1-0.4
+1.1+0.4-1.3
-0.1+0.1+0.0
If winner is:HomeTieAway
Week of 6/4100.0*Chance in playoffs100.0*World Cup Qualifying100.0*Average seed
Tahiti vs New Caledonia+24.5+2.4-25.6
YesYes-10.7
+1.3+0.1-1.3
Fiji vs Vanuatu-2.3-0.1+2.4
+0.0+4.6-2.0
-0.1+0.1+0.1
New Zealand vs Solomon Islands+2.2+0.5-2.4
+1.3-0.9-0.9
Papua New Guinea vs Samoa-1.4+1.1+0.9
+2.9+1.5-3.5
-0.0+0.2-0.0

What If

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

100100100100100100100100
If finish:Chance inWorld CupChance will finish regular season at seed
TPW-OTLTplayoffsQualifying12345678Count
92-000InYes81193,275,647
71-001InYes346512,799,484
61-01099.4%Yes332461816,536,568
50-00291.8Yes10414180599,920
40-01149.1Yes08414382,799,166
30-0200.256.0%014423953,275,151
Total:75.2%92.5%20241813987119,285,936
Points
Chance Will Make Playoffs