1)

(a)What is the Halachah according to Beis Hillel if someone says that he wishes to become a Nazir if the person approaching is a certain person, and he adds that even if he is not that person, as long he is a Nazir (I wish to become a Nazir)?

1)

(a)If someone says that he wishes to become a Nazir if the person approaching is a certain person, and he adds that even if he is not that person, as long he is a Nazir (I wish to become a Nazir), he becomes a Nazir because his second words were fulfilled.