applying for canada visitor visa

[rshah00]

hello I am applying for canda visitor visa for me and my husband

I am not sure about these forms.
-IMM5713 form ( family member representative form) - i dint have any i dont knw why its asking me to fill.
- IMM5645 from ( cannot even open it) --family information form.
- proof of relation --i m visitng my friend from college( how do i provide proof of relation of that )
please help me finish my application.
thankyou