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
England 36 Italy 15 +1.3
+0.1
Ireland 19 France 9 +1.2
+0.0
Scotland 29 Wales 13 +0.2
If winner is:HomeDrawAway
Week of 3/10100.0*Chance wins title100.0*Average seed
Wales vs Ireland+12.5+12.1-7.3
+0.1+0.1-0.1

What If

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

100100100100100100
If finish:ChanceChance will finish season at seed
TPW-OTLDwins title123456Count
18-20Yes10021,016,307,925*
161-01041.1%41599,741,562,945
0-002Yes10035,847,938
140-0119.7104446413,110,676
120-020No254451,137,899,232
Total:77.6%78182232,344,728,716

* Row combines multiple less frequent records.

Points
Chance Will Win Championship