calculation logic for the Tree Diagram numbers, derived, expected, creating, understand

toocfatoo

I understand the purpose for creating a tree diagram, but I am unclear about how the numbers are derived.

I am unable to paste the diagram here, but one can be viewed either on page 338 (Reading 8- Figure 2 BankCorp's Forecasted EPS) on the CFAI book or page 202 (Reading 8: Figure 3: A Tree Diagram) on the Schweser book.

Question: how are the forecasted EPS numbers (total of 4) on the right derived from the one expected EPS on the left?

Steps for the calculations would help....thanks!