Easy Riddles

I see without seeing, to me, darkness is as clear as daylight. What am I?

When I take five and add six, I get eleven, but when I take six and add seven, I get one. What am I?

What has four legs, but can’t walk?

I have no bed to sleep nor do I have a palace to live. I don’t have a single penny with me, but still I am known to be a king. Who am I?

What has roots that nobody sees, is taller than trees, up, up it goes, yet it never grows?