Identify The phrase in the picture.

A maths symbol is hidden in the below Bar Graph. Can you decipher it?

Rahul decided to meet Simran so he boards a local train from Bombay station. Just after the station, there is a 1km long tunnel. The train starts and is now accelerating. Rahul is a claustrophobic guy, so what is the best position for him to sit?

Pronounced as one letter,
And written with three,
Two letters there are,
And two only in me.
I am double, I am single,
I am black blue and grey,
I am read from both ends,
And the same either way.

What is harder to catch the faster you run?

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?

Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

What brings you down but never up?

It's a protector.
It sits on a bridge.
One individual can see directly through it, while others wonder what it hides.

What is it?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?