How are these numbers calculated?

Big Games

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

Week of 2/25100.0*Chance wins title100.0*Average seed
Ireland 19 France 9 +4.5
+0.6
England 36 Italy 15 -1.2
-0.0
Scotland 29 Wales 13 -0.4
-0.0
If winner is:HomeDrawAway
Week of 3/10100.0*Chance wins title100.0*Average seed
Wales vs Ireland-14.9-14.0+8.7
-1.0-0.6+0.5

What If

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

100100100100100100
If finish:ChanceChance will finish season at seed
TPW-OTLDwins title123456Count
162-000Yes1004,830,993,833
141-0012.3%298932,122,511
121-0100.10851517,420,890,139
0-002No831735,852,738
100-011No445521,148,846,024
80-020No1187927,976,023,471
Total:15.1%15491421132,344,728,716
Points
Chance Will Win Championship