Replacing a few code blocks with embedded repls

[Bharath314]

Replit allows for repls to be embedded into other sites. I'm thinking of changing a few code blocks to repls where the code needs to be run with different inputs to understand the underlying concept. I'll keep adding a list of code blocks that need to be replaced. I have inserted comments at the code blocks that need replacing.

• L 3.5
• L 3.6