What Am I Riddles

Question: There are two sisters: one gives birth to the other and she, in turn, gives birth to the first. Who are the two sisters?

Question: What am I?

Question: I stare at you, you stare at me.I have three eyes, yet can't see.Every time I blink, I give you commands.You do as you are told, with your feet and hands.What am I?

Question: What flies when it's born, lies when it's alive, and runs when it's dead?

Question: 100 feet in the air, yet its back is on the ground.

What is it?