Pleas Help Me..

 Dear Sir  / Madam,      Somebody changed my friend's gmail a/c password, now he cant access his g mail a/c, because he has given his other mobile number and that mob no is switch off And he had forget his alternative g mail a/c. because he is not using the alternative g mail a/c, so in this situation, can anybody help me , so that i can suggest him the way to recover it. So Please help me to recover my friends problem  Expecting a solution mail from your side so that i can recover my friends problem..   Thanks and regards