Answer:
Step-by-step explanation:
Scenario 1:
Entailment: False. Sentence b is not entailed by sentence a.
Presupposition: False. Sentence b is not a presupposition of sentence a.
Scenario 2:
Entailment: True. Sentence b is entailed by sentence a.
Presupposition: True. Sentence a presupposes that the subject has children.