You are correct.
Your computer has been hacked by another person or there is a virus on it.
The only way to know if your Facebook has been hacked is if the profile is posting spam and/or your password has been changed .
You can download an antivirus to monitor your phone. This will let you know if your phone has been hacked.
I hacked your computer
If someone from Answers told you that your Android had been hacked, they probably based it on information that you provided. We have no way of knowing if your phone was hacked.
That means your account has been hacked. If your account has been hacked, someone can send mails from it. The mails can be of any vulgar topic too.
You can't "fix" a hacked computer. It depends on what has been done, but if they install a virus, use a antivirus program or format the harddrive. If they just connect to your computer and hack the password, reset the password and change your IP. Easy as 3.1415926535
no
There is not a way to tell if a webcam has been hacked. The safest way to be sure is to stop using it.
No, not unless you give away some private information that my contain things where they know your password
No, WikiAnswers has not been hacked.