Opportunity Cost, PPF & Attainable & Unattainable combinations(Ch-1 Part 2 Microeconomics)

Hi guys!! Hope you all are doing well & enjoying the videos😄Here comes the video of part 2 of Ch-1 Microeconomics.
Kindly watch it & please like, share & subscribe my channel. Answers of previous questions,
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have been provided along with next set of questions to be answered (in the end)
(Happy brainstorming 😁)
Mention key points of your answers in the comment sections.

Microeconomics)