Forever
=yes.=
There is no law addressing this.
Id say 45 minutes
as long as the her/him is responsble enough n knows how to do the job
As long as the parents trust them to be alone. There is no law or regulation, it is a matter of what makes sense.
No, you have to be around 15/16+ to stay at home with a younger sibling/relative.
They can be home alone for an hour it depends if he/she is mature enough and if your neiborhood is safe
well a 10 year old to me can be left alone if they feel comfortable enough to but if there not responsible probaly only a half hour
no they can't
yes if s/he is trustworthy
A 12 year old can baby sit
No, it is illegal. So: under adult supervision, yes.