I think the sentences that contain a restrictive clause is the 2nd and 4th one.
Answer:
A summary
Explanation:
A gist statement sums up a point.
it has a maximum of 20 words and usually a min of 10 words. it cuts to the point instead of explaining more than you need to.
Samuel is the antecedent, and his is the pronoun that refers back to the antecedent.
Answer:
We need the problem first
Explanation: