How are these numbers calculated?

Big Games

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

If winner is:HomeDrawAway
Week of 9/20100.0*Chance in playoffs100.0*Average seed
Russia vs Samoa-16.6-1.8+16.7
-2.6-0.3+2.6
Japan vs Russia+0.4-3.5-3.1
+0.0-0.3-0.1
Ireland vs Scotland-0.0+1.6-0.0
+0.0-0.2+0.0
If winner is:HomeDrawAway
Week of 9/28100.0*Chance in playoffs100.0*Average seed
Scotland vs Samoa-16.6-1.8+16.7
-2.6-0.3+2.6
Japan vs Ireland+0.4-3.5-3.1
+0.0-0.3-0.1
Ireland vs Russia-0.0+1.6-0.0
+0.0-0.2+0.0

What If

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

100100100100100100100100100100100100100100100100100100100100
If finish:Chance inChance will finish regular season at seed
TPW-OTLDplayoffs1234567891011121314151617181920Count
164-000In642971347,653,544
143-001In264225710068,538,286
123-01097.1%381319231910330004,039,304,855
2-00299.92815222519920003,877,918
102-01177.400019252912203000407,772,287
1-00378.1002112628111930087,548
82-02027.4000003915813151512731000010,053,081,504
1-01225.7000281651117181372000012,881,944
0-00418.8151321323261441698
61-0210.000001924322392000609,981,709
0-0130.9100182333249100130,461
41-030Out000149172120161039,365,021,287
0-022Out000151629281658,999,704
20-031Out0005224330270,719,521
00-040Out1729643,010,446,334
Total:26.3%1223445635566677767828,198,497,600
Points
Chance Will Make Playoffs