Question

done

Answer 1

4*3*2*1

Answer 2

oops thats wrong, i need to think

Answer 3

so we hv 4 rooms left
in first room one of only 3 of em can sleep
in the next room, one of only 3 of em can sleep
in the next room, one of only 2 of em can sleep
in the next room, one of only 1 of em can sleep

so its, 3*3*2*1

Answer 4

yea. thats fixed. so we dont hv to worry bout them

Answer 5

coz the 4th cant sleep in their own room rite

Answer 6

You're welcome