Where do Malcolm, Donalbain, Ross, and Macduff go at the end of Act 2 in Macbeth, and why?

Macduff; "Malcolm and Donaldbain, the King's two
sons,

                Are stol'n away and fled, which puts upon
them

                Suspicion of the
deed".

   These two, innocent, are accounted for. Malcolm goes into
England, and enlists the help of the English king, Edward the Confessor, in raising an army to
face Macbeth. Donaldbain to Ireland.

Ross: Will you go to Scone?" (
and witness the coronation of Macbeth as King of Scotland, 10th
century)                  

Macduff: "No cousin, I'll to Fife".( And
spend the meantime with my wife and family, soon to be murdered by
Macbeth!).

  Interesting that Shakespeare introduces an 'old man' to
this scene, who uses an old ENGLISH word at the end of it, 'benison'. Derived from 'benefice' or
kind words and good thoughts.