npn transistor and impedance question?

Hello , i have question about transistor .The picture below is a simple npn transistor booster .Can you give me the formula of gain and output impedance of this schematic please.
Thanks!

sorry for my bad English!

Picture of npn transistor and impedance question?
Sounds homework to me. Use the Ebers-Moll model and the analysis is pretty straight forward.

Steve