Save workbook with multiple sheets as csv file and xlsx file

Hi,

I have a xlsm workbook with 3 worksheets. I've recorded a macro that formats the data in these sheets. I want the file to then be saved as a csv file (which IT picks up to load into an application) and an xlsx file for my records.

How can I save the data in the 3 worksheets as seperate csv files?
How do I save the xlsx file with 3 worksheets in it?
All the column headers are the same. The number of rows having data differs in each sheets.

Thanks,