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 +26.4
+24.8
+1.3
Papua New Guinea 1 New Caledonia 1 -1.1
-1.3
Vanuatu 0 New Zealand 5 -0.5
+0.1
-0.1
New Zealand 3 Fiji 1 -0.1
-0.2
Vanuatu 0 Solomon Islands 1 -0.1
-0.1
If winner is:HomeTieAway
Papua New Guinea vs Tahiti-17.8-0.2+14.7
-1.3YesYes
-1.2+0.0+1.0
New Caledonia vs Samoa-2.4+3.1+4.2
+0.6+0.5-2.0
-0.1+0.1+0.1
Solomon Islands vs Fiji-0.3+1.3-0.2
+0.1-0.2-0.4
-0.0+0.1+0.1
If winner is:HomeTieAway
Week of 6/4100.0*Chance in playoffs100.0*World Cup Qualifying100.0*Average seed
Tahiti vs New Caledonia+14.7-7.5-33.6
YesYes-2.8
+0.7-0.4-1.5
Papua New Guinea vs Samoa-0.7+1.8+3.5
+0.2-0.1-2.3
-0.1+0.2+0.1
New Zealand vs Solomon Islands+0.6-0.4-1.2
+0.0-0.1-0.0
Fiji vs Vanuatu-0.4+0.5+1.0
-0.1+0.7-0.2
-0.0+0.1+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
92-000InYes653516,773,281
71-001InYes1285211,453,334
61-01099.8%Yes0175329019,981,540
50-00295.2Yes105431501,918,851
40-01140.3Yes04365546,464,587
30-0200.390.5%04347905,125,415
Total:85.3%99.2%203120141041061,717,008
Points
Chance Will Make Playoffs