What does below Rebus say?

XLR8

If we tell you that there is a relation between the numbers and letters in the given figure, can you analyze it and find the missing letter in the last box?

I make two people out of one. What am I?

You see a mathematical expression in the picture. Can you think of a movie that this expression refers to?

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

Solve the puzzle by telling what does below picture means.

French Police inspects a room where there are no windows, no doors, no tables and is almost empty expect there is just a puddle of water. They found a dead man who obviously hung herself from the ceiling, but they are not able to figure out how this had happened.

John and Jacob entered the crime scene and easily able to solve the case.

How did the man die?

Take one out and scratch my head, I am now black but once was red. What am I?