How are these numbers calculated?

Big Games

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

Week of 4/20100.0*Promoted100.0*Average seed
Montrose 2 Airdrieonians 1 +5.7
+0.4
Dumbarton 3 East Fife 0 +3.3
+0.1
Week of 4/27100.0*Promoted100.0*Average seed
Stenhousemuir 1 East Fife 1 +1.3
+0.1
Forfar Athletic 1 Montrose 0 -1.1
-0.0
Week of 5/4None
Points
Chance Will Win Championship