Perfect competition questions
I'm not going to answer the questions for you, but here is some food for thought, you should be able to conclude yourself.

Ad 1

We know that in the long run equilibrium, there are zero profits: If they'd be positive, firms would enter, if they'd be negative, firms would leave. Can we conclude something about a firm's profits if it has average total costs smaller (larger) than the price?

Ad 2

What induces change in the total amount of companies in such a branch? Is having zero-profits one of these reasons?