Octopi Team's Work week of 3/22

[sarahg500]

Don't forget a stage label and to set a reviewer and assignee to your reviewer. (please remove this line before starting your PR)

Issues Closed

Finishes all activities and formats them correctly and their corresponding issue

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Changes proposed in this pull request:

• added checkpoints
• Interview questions
• formatting, mostly for concepts
• folder structure

@reviewer/kavuong