To my beloved kids Noursin, Amira, and Yousef. You're the inspiration!

This book is dedicated to the memory of my father (God bless his soul) and also my mother, who's been a rock of stability throughout my life. This book is also dedicated to my beloved wife whose consistent support and patience sustain me still.

My sincerest appreciations for a lifetime career that has surpassed anything my imagination could have conceived.

Ayman Elnashar

To my Family for all their continuous support. To my elder brother for his guidance and motivation throughout the years. To my inspirational, intelligent, and beautiful daughter, Hana.

Your work is going to fill a large part of your life, and the only way to be truly satisfied is to do what you believe is great work. And the only way to do great work is to love what you do. If you haven't found it yet, keep looking. Don't settle. As with all matters of the heart, you'll know when you find it. – Steve Jobs

Mohamed A. El-saidny

This work would not have been possible without the consistent and full support of my beloved family. To my beloved wife, Meram, to my intelligent, motivating, and beautiful kids, Moustafa, Tasneem, and Omar. You are my inspiration.

To my Dad, my Mom (God bless her soul), my brother, and my entire family. Thank you for all your support and encouragement.

There is no elevator to success. You have to take the stairs. – Unknown Author

Those who think they have found this elevator will end up falling down the elevator shaft ...

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