Find a unit vector in the direction of the given vector. 
Definitions:
Global City
A significant urban center with a major influence on global economics, politics, and culture, often marked by a highly diverse population and a dynamic economic environment.
Mumbai
A major metropolitan city in India, known for its financial, commercial, and entertainment industries, as well as its diverse population and vibrant culture.
Urban Density
Concentration of people in a city, measured by the total number of people per square mile.
Georg Simmel
A German sociologist and philosopher who contributed to the foundations of sociology and the study of social forms and interactions.
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