without doing your work for you extrapolate this review, and come up with your answer, it is rather simple http://www.pcadvisor.co.uk/test-centre/security/windows-antivirus-best-pc-antivirus-free-paid-antivirus-2016-uk-3263332/
If you're going to post your course work questions on here it might be nice to preface your questions with something like "I've got this question for my course work and despite trying as hard as I can [perhaps explaning a little of what you've done] I cannot find the answer. Can anybody help please?"
You might get a better response than simply cutting and pasting your course questions as you seem to have.
Oops. Did I really type 'know' instead of 'no'?
I agree with New Judge. it looks as if someone doing the same course also has a similar list of queries today- maybe you could get together and share ideas
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