PLEASE HELP!! 20 POINTS

Which expressions are equivalent to −7b(3−c)?
Select each correct answer.

21bc
-4b + 7c
-7b - 21bc
-21bc + 7bc
(-7b * 3) + (7b * c)

Which expressions are equivalent to this expression?

3(n - 4)

Select each correct answer.

3n + 12
2n - 12 + n
-12 + n + n + n
3n - 4