You can convert PDF files into Google Docs within your Drive, but the formatting may not be perfect.
To convert PDFs into Word files and on Mac, you should edit them with Google Docs or other third-party applications.
In the top menu of Excel select Data > Get Data > From File > From PDF. Browse your files and select the PDF with the table ...
The files with AI extension represent the vector images created in Adobe Illustrator software. Graphics designers use Adobe Illustrator to create different types of images, like banners, logos, ...