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From Slavery to Freedom.

I need a summary of chapters 1 and 2 from book:
Higginbotham, John Hope Franklin and E. From Slavery to Freedom. Available from: Yuzu Reader, (9th Edition). McGraw-Hill Higher Education (US),
I am not sure you will be able to access it through this website.
https://yuzu.vitalsource.com/reader/books/0077503546/pageid/500
Chapters 1-2. In your summary, specifically focus on the following questions:
What commodities were traded among the various regions of Africa?
How did slavery develop in Africa? How did it compare to slavery in European communities
What was the Middle Passage?