No it doesn't require a hyphen.
Use a hyphen when the parts of the compounds are not commonly used together. Common compounds: worldwide, clockwise Unusual compounds: community-wide, nutrition-wise
It does not need to have a hyphen! :)
No, the word "nineteen" does not need a hyphen when written numerically.
No
It's not a word in the dictionary, so yes, use the hyphen.
I do not believe that multitasking is supposed to have a hyphen.
You typically need only capitalize after sentence-ending punctuation, which a hyphen is not.
no
No.
No
no