i have an homework in class transportation

the book we use is

Traffic & Highway Engineering, Nicholas J. Gerber and Lester A. Hoel 5th Edition, E.I., 2015.

I don’t have the book

the homework questions is from this book

Chapter 5 questions are: ((5.2)) ((5.3)) ((5.4)) ((5.5)) ((5.8)) ((5.12)) ((5.21))

the answers typed

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