Good Riddles

Question: A thing which is Live ,as we use it Everyday for watching this Beautiful Nature,and has high auto-focusing strength!!! so what is it??

Question: A man walks into a bar and buys 3 pints in total costing 5 pounds the man leaves the bar wirhout spending a penny. Hows this?

Question: What is little in Arab and big in Barcelona?

Question: You use me. I keep you neat. Every once in a while you empty me out. What am i?

Question: I can be curved or straight And have many legs But with four letters less I am exactly the same What am I?(5 letters)