Question 20
AUTOMATED PLANNING 1 Answer the given subquestions.
In planning graphs constructed by GraphPlan, actions a and b in layer n are mutex __________ .
only if every P in pre(a) is mutex with every Q in pre(b)
only if every P in pre(a) is present in del-effects(b)
if P is in pre(a) and also in del-effects(b)
if P is in add-effects(a) and also in del-effects(b)