Question

4. The extension of any file can be changed by saving the file using
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Answer 1

Answer:

.ext

Explanation:

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Answer 2

Answer:

In order to change which program your computer uses to open a file, right-click on the file in the File Explorer and select "Open with..." to choose your desired program. ... When you save the file, in the bottom left corner of the window, click "hide extension." This will keep the extension from appearing in Finder.