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That's what an Answerers responsibility to research in-depth and deliver the best solution to askers. And if any uncertainty is there, answers has the option to skip. We cannot help you in this regard, it would be partiality.
If you haven't received any feedback, then that means there's nothing new to say. Whereas, for increment your performance is being monitored and the needful will be done if applicable.
Please, follow the below given method for attachments.
Download the papers in your PC > Upload them into your Google Drive > Double click the respective file once it gets uploaded to your Drive > At the top right corner 3 dots icon will be there > Click on it and then on "Share" and then on "Get Shareable Link" > Copy this link > While typing the answer provide this link to download the respective paper. Make sure that you don't provide the link naked in your answer, rather use "Hyperlink" option like this - ABC exam paper 1 [insert link within].
Go to > UserCP > Settings & Options (left side menu bar) > Messaging & Notification > Visitor Messaging > Limit usage of Visitor Messages to Contacts and Moderators > Save changes.
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