Naomi, a PC user, is creating a spreadsheet that will be used by people using older versions of Excel on Macs. What menu options should she follow to find the Excel tool that will let her know if there are any compatibility problems?

To check for compatibility issues in Excel, Naomi can follow these steps in her spreadsheet:

1. **Click on the "File" menu**: This is usually located in the top left corner of the Excel window.

2. **Select "Info"**: In the File menu, look for the "Info" option on the left side.

3. **Click on "Check for Issues"**: In the Info section, there is an option labeled "Check for Issues."

4. **Choose "Check Compatibility"**: From the dropdown list under "Check for Issues," select "Check Compatibility."

This tool will analyze the spreadsheet for elements that may not be supported in older versions of Excel, helping to identify potential compatibility problems for users on older Mac versions.

Note that the steps may vary slightly depending on the exact version of Excel being used, but the general process remains consistent across modern versions.