What is the Surname of Barbie Doll?

There are are five things wrong with this sentence; only geniuses will be able to to spot all of the mitstakes

There are two guys standing face to face in a room. On a wall, there is a clock. One of those is a prophet. He tells the other guy that he will be stabbed in the back in five minutes.

Shocked to hear that, the other guy stares at the clock. Just after the five minutes, he is stabbed on the back. Can you tell what happened?

What comes
Once in a Year
Twice in a Month
4 times in a Week
6 times in a Day

Can you name three consecutive days without using the words Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, or Sunday?

What have one eye but still cannot see?

If two's company, and three's a crowd, then whats four and five ?

You are in a land where thirty men and two women were dressed in classic black and white dresses.
They begin to fight as soon as any of them move.

Where are you?

You can find some missing letters in the picture. By placing two particular letters in the spaces, you can form a nine lettered word beginning from one of the corners and going clockwise direction to the middle. Can you find out the letters and the word?

A father's child, a mother's child, yet no one's son.

Who am I?