How to making request and polite to the others.

There are some words to make request politly, if you dont wanna people think that you are rude, you should know how to making request properly, i've just watched three videos from this Power Point slide on link below https://docs.google.com/presentation/d/1LqoMgCV9qIkythp9Yv6oNsz_JGBuLGY_HWn9GuY26es/edit#slide=id.g124413b5b_030 by my listening class lecturer Mrs Rina Marnita  http://rmarnita.blogspot.com/ actually the videos are similar, they were talked about How to make request politly, 

1. from the first video by Rebecca, i learnt something about how to polite to the others, and how to make request politly, we have to be carefull when we gonna ask someone to do something, and using the polite words, just like the example: [could you please], [would you mind], [could you] [would you] for the example if we are in restaurant, and we out of salt on our table, we call the waitress and ask her for another salt, we can using [could you please].  " Could you please give me another salt?" 
2. from the second video by david, i also learnt about how to making request, and asking for someone to do something, and the example " i was wondering if it were possible for you to complete the report by thursday instead of friday" 
3. and the third video in office when a woman asked a man to help her burning CD with her favourite songs.

the conclusion is, just like i said in the beginning, if you dont wanna people think that you are rude, you have to be carefull when asking someone for help, and the most important thing is they will happy to do what you asked for, if you ask them politly

and i tried to answer the question online, there are 5 question, and i did it perfectly, this is the result: