8 balls are being put in 4 cells, randomly.

1. What is the probability that all 8 balls will be put in 1 cell (doesn't matter which one) ?

2. What is the probability that each cell had at least 1 ball

3. What is the probability that in each cell there were exactly 2 balls ?

4. What is the probability that all 8 balls were put in 2 cells only (doesn't matter which ones) ?

Any help and guidance will be very appreciated !

cheers !