at least 10..
Okay, in that case, we can't do someone else's homework here either until they come and show what they've attempted.Who said thats my homework??
It was a question in Yahoo answers..
Check it out; http://answers.yahoo.com/question/index?qid=20070204022737AANjXkd&r=w&pa=AptqD2bwHTHf6eCHYqQyuVxnr4SWDYFWr2LRdXEaturQHA--&paid=voted