yes
9-12 years old
This should take a 9-12 year old to run a mile is 6-9 min.
Yes, a 12 year old may be able to be pregnant.
i wouldn't because its 3 years away, but still, if they're responsible enough then go ahead.
its possible
Yes. A 12 year old will not find it hard to maintain discipline with a 9 and 7 year old, but it is a good idea to tell them to behave and offer a reward if they are good. She/he will find it easier if they know to behave.
Oh, lets see a 9 year old is completely different from a 12 year old because they don't start to develop and look at there gender in such a way as yet, so go with something of there favor.
no.
There's no law against it but your parents have to be OK with it.
6-9
The weight of a 4 ft. 9" 12 year old should be around 95 to 110
I think you could leave a 6 year old with a 12 year old. I am 12 and most of us 12 year olds are confident mature and great with kids so i would say most likely.