Can someone correctly answer these questions?

3. which of the following sentences is not punctuated correctly?
a) the doctors, lawyers, and accountants in town charge high fees.
b) on the test, the two manufacturers' results were very different.
c) the walls were solid; but the foundation was crumbling.
"we close at midnight," announced the ticket taker.

4. which of the following sentences is not punctuated correctly?
a) a walk in the park, a run in the rain, and a long sleep are what i most want.
b) i had an hour wait at the doctor's office this morning.
c) amos forgot his towel, and so he had to borrow james's.
d) i got two a's and two bs on my final exams.

7) which of the following sentences has an error in pronoun usage?
a) no one saved one of the school newspapers for me.
b) he and she sometimes work at the video store after school.
c) melissa and me are going to the movies together
d) they did not notice her waiting in the back of the gym

what clause is the boldfaced words
we must wait here "untik the latecomers arrive".
noun, adjective, adverb or independent ?

what clause is the boldfaced words?
"because the snow has fallen steadily all night", school is closed.
noun, adjective, adverb or independent