I need the format of a business letter, and a friendly letter! P.S: also need the spacings if they are any. I mean like the spacings(No. of lines) between ______ and _______.

3 answers

http://owl.english.purdue.edu/owl/resource/653/1/

There are detailed explanations here ... and scroll down for a graphic showing you about the spacing, etc.
http://www.google.com/search?rlz=1C1GGGE_enUS379US379&gcx=c&sourceid=chrome&ie=UTF-8&q=how+to+write+a+friendly+letter
Friendly letter about December holidays