Questions about the Master's degree African Studies

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I would like to have exams from another course recegnized for my African Studies. How does that work?
I want to start my master's degree in African Studies. What must I do?
What requirements do I have to meet in order to be admitted to the master's degree?
What about the "special field"?
When can I start writing my master's thesis?
How do I find a supervisor for my master's thesis? Who can supervise a master's thesis in the department of African Studies?
Can I change the supervisor for my master's thesis?