The sweetest sounds in the universe - "chai chai"

Some questions if anyone will give answer then it will confirm that he is a die hard fan of indian railways☺--
Part 1.....and also i have no intention to hurt any zonal railways it just a quiz and for increasing knowledge (kyuki google se sab pata nahi chalta)......
1. Which zone have very less experimental halts?
2. Which zone have highest number of experimental...
more...

halts?
3. Which zone gives highest revenue(passenger)?
4. Which zone gives minimum revenue(passenger)?
5. Which zone have highest number of trains?
6. Which zone have lowest number of trains?
7. Fastest passenger of whole indian railway?
8. Asia's first railway station?