Help with this only right answer 50 points plus brainleist

Answer 1 :-
• 5⁰ = 1 so option B is your answer
Answer 2 :-
9 , 5 , 1 , _____
Here difference between each term is 4 so the term after 1 also be the difference 4
So ,
=> 1 - 4
=> -3
Hence , the term after 9,5,1___ is - 3 . So option B is your answer .