Grammar in toc

Question

What language does the grammar with these productions generate?

S->Aa

A->B

B->Aa

Answer 1

This grammar will generate language L={} or $\phi$.

put B production in A

now S-> Aa, A-> Aa (A is useless because A has no way to get a terminal string)

So {} or $\phi$

Answer 2

it doesnot give any terminal which is free from variable ,

language accepted is { }