The below given figure comprises of a pattern through which you can determine the missing letter. Can you push your mind to find the pattern and add the missing letter?

What is both possible and impossible at the same time?

What is the last thing you take off before bed?

I can sizzle like bacon,
I am made with an egg,
I have plenty of backbone, but lack a good leg,
I peel layers like onions, but still remain whole,
I can be long, like a flagpole, yet fit in a hole.

I am a type of word that is spelt incorrectly or used differently, on purpose for humour. What am I?
Hint 1: You can find me in a joke.
Hint 2: I am a play on words.

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

I am never scared but became petrified and can’t live in a house but would die to make one. What am I?

When does a USA Potato change its nationality?

What am I?

Forwards I am heavy, backward I am not. What am I?