Questions about vilages loged in google + !

1#How do i know in which of my Google+ accounts is my village saved?
2#Can i overwrite a vilage into another with the same Google+?
3#If i have one vilage with one Google+ in my phone, switch it to another village with another Google+ in the same phone and then change back to the village i had before will i lose any village?
4# if number 3# is possible, can i keep playing in multiple vilages with different Google+ accouts on the same phone( keep changing Google+ accounts to load another vilage and then change the Google+ i had before and play in the previous village)?

Please help me!