What is the Surname of Barbie Doll?

What are the next two letters in the following series and why?
W A T N T L I T F S _ _

*Hint: Check Puzzle Title

A B C D E F G H

These are the letters given to you. Now you have to find out the letter that comes two to the right of the letter which is immediately to the left of the letter that comes three to the right of the letter that comes midway between the letter two to the left of the letter C and the letter immediately to the right of the letter F.

My location can be determined by the below rebus.
So where am i ?

If eleven plus two equals one, what does nine plus five equal?

In the given picture, you can find two letters missing. When two particular letters are placed in the missing spots, you get an eight-letter word while reading in the anti-clockwise direction. Can you find out the missing letters and the missing word eventually?

Find out which of the given views in the picture is accurately the top view of the given pyramid.

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

An old Woman left INR 33,333 to be divided equally among two fathers and two sons and each was to receive INR 11,111.
How was this possible?

Can you identify if it's a murder or a suicide ?