Well why not start by giving us your answers to these questions and then we will tell you where you are going wrong! These are pretty basic questions which if you cannot get them right then no amount of coaching will really be beneficial to you!
Just remember, you dont want to be cabin crew in order to travel and you dont want to work for the airline in question because they are simply hiring and you just really want to be crew!!!
As for the last one think of what you have worked as in the past and how it may be relevant to crew!