Windows has a ZIP utility built in that you can use to create compressed archives. Assuming you have a workspace with two projects inside (one for timed blinking, the other for the button push), right click on the entire workspace folder, find the "send to" item in the context menu and select compressed folder. That will save everything the grading team will need to check your homework

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Similarly, Mac OS X has a built-in ZIP function. From the finder, right-click on the folder that you want to ZIP and choose “Compress” from the contextual menu.