I sign up as Student, how can I reply answer to someone

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I have signed up this site as Student, but I found that some questions asked by other student are easy to reply, But I have no way to reply, is this possible me to reply question 

Oct 11th, 2014

Yes you can answer, the only thing you need to do is create a new login as a " tutor" with new email

Oct 11th, 2014

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Oct 11th, 2014
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Oct 11th, 2014
Sep 22nd, 2017
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