1)
Who saw [Shimshon]?
1.
Radak: The 30 friends. Even though the verse mentions them later, the Mem in "ki'R'osam" also refers to them, like "va'Tir'ehu Es ha'Yeled 1 " (Shemos 2:6).
2.
Metzudas David: The woman and her father.
1
Also there, there is a pronoun for what is mentioned later, just there it is the object, and here it is the subject. (PF)
2)
What are Mere'im?
1.
Rashi: They are friends who participate in the nuptial feasts.
