a. Stephan says that ΔXWV ≅ ΔUWS by the SAS congruence postulate. Do you Agree or Disagree? Justify your decision. Hint: State if you agree or disagree. - If you agree, identify the congruent corresponding parts that prove your opinion and the reason you know they are congruent. - If you disagree, identify the existing congruent corresponding parts and the part(s) that are needed but not provided to prove the triangles congruent using SAS.b. Suppose that it is also known that ∠V≅∠S.Which postulate or theorem can be used to prove that ΔXWV ≅ ΔUWS?Justify your decision.Hint: Provide the name of the congruence postulate or theorem. - Then, identify the existing congruent corresponding parts and the reason you know they are congruent. - However, if you think there is not enough information to prove the triangles congruent, identify the existing congruent corresponding parts and the part(s) that are needed but not provided.Please Help!!!