Okay. That alleviates a lot of confusion. I still have plenty left, though. 

For a 4, can it bounced off a fielder? (muffed catch)

A 4 can even be with as many bounces as it can take. 

Actually there's a rope around the ground nearly 60 to 70 metres from the pitch. If a bowl crosses that rope on the fly, it is a six. If the ball crosses that rope through the ground, it's a 4.

Coinsreporter

I know these are 5year old kid questions for you, but a 6 is into the crowd on a fly, and a 4 is into the crowd on one bounce? 

siggy47

Stacker_Sports

T20 Cricket WC Survivor Pool of Pools — Pick Your Winners (Next 5 Matches)

You should check out some of the crowd catches over the years. Big sums of money for a clean, one-handed crowd catch off a ‘6’ on tv