Woocommerce custom field in product page

Hi,

I need to be able to add a few fields on the woocommerce product page. They will be filled up by the buyer before add to cart. Once the product is ordered Admin should able to see the field values filled by the buyer. I will also need a file upload field to allow multiple files to upload. For this, I have found a premium plugin. But I got stuck with the custom fields. Is there any solution for this?

Thanks for your help.

Regards
Debashis