Beards and Moustache

Q: Is it permissible to shave the moustache completely off?

Q: With regards to keeping a beard. It is Waajib? Does this ruling only apply to the Hanafi madhab? I have a family member who follows Imam Shafi'ee and he would like to know the ruling.

Q: What is the ruling regarding men growing a beard? Is it necessary or merely a tradition?