homeland security system in Germany

Please write a paper on the homeland security system of the country you chose (Germany) covering the questions provided (Below) , and provide three distinct examples of their work.
Briefly describe Germany (demographics, population, GDP, etc.)
Overall review of the homeland security system, including the local, state, federal (national) level of security structures together with
Law enforcement bodies
Specialized units
Overall hierarchy of the structures within the governmental system
National security and intelligence structures
Judiciary and its role involving the homeland security apparatus
Interagency (domestic) cooperation
International cooperation