Simple hwk q's...

Hello all,

I have some simple hwk questions and I can't find anywhere that can answer them! Can anyone help?!

I have a wireless bridge link with a clear Fresnel zone, determine the:

(i) link loss if the path length is 16 km

(ii) received signal power in dBm and mW

(iii) link reliability if the fade margin is 10dBm?

Note I have all of the relevant figures on the diagram...any formulas/calculations?

P.s please can you explain it in simple terms because I am no expert!!

Thank you very much.