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 -25.4
-24.0
-1.2
Papua New Guinea 1 New Caledonia 1 -1.1
-1.3
Vanuatu 0 New Zealand 5 +0.1
+0.8
+0.1
Vanuatu 0 Solomon Islands 1 -0.1
-0.1
New Zealand 3 Fiji 1 -0.1
-0.2
If winner is:HomeTieAway
New Caledonia vs Samoa-4.4-0.3+12.6
-20.3-10.4+65.3
-0.6+0.1+1.5
Papua New Guinea vs Tahiti-1.8+1.2+1.0
-1.2+0.2+0.9
Solomon Islands vs Fiji+0.1-0.5-0.0
+0.7-1.5-2.1
+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
Papua New Guinea vs Samoa-4.4+7.9+28.3
-6.5+4.2+62.1
-0.3+0.5+1.9
Tahiti vs New Caledonia+0.2+0.7-1.2
+2.0+1.2-6.4
+0.0+0.0-0.1
Fiji vs Vanuatu-0.2+0.2+0.6
-1.4+6.5-1.4
+0.0-0.1-0.1
New Zealand vs Solomon Islands+0.2-0.2-0.4
+0.1-0.2-0.2

What If

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

100100100100100100100100
If finish:Chance inWorld CupChance will finish regular season at seed
TPW-OTLTplayoffsQualifying12345678Count
62-00099.7%Yes02246310916,430
41-00157.7Yes05533843,085,813
31-0100.287.0%0355213012,610,061
20-0020.439.906335911,918,321
10-011Out2.73861114,827,492
00-020OutNo356528,358,891
Total:4.4%26.1%0013912413261,717,008
Points
Chance Will Make Playoffs