Sorry for late answer...

For your first question, if Audit feature configured in your sharepoint application, you can able to get the reports.

For second question regarding the OOB aduit feature
Please check the below post, it will help you out

http://www.codeproject.com/Articles/431342/Auditing-A-Built-in-Feature-of-SharePoint

Thanks,

Somasekhar Akiri.

SharePoint Audit Log Reports
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