The Democratic Republic of the Congo Quiz

Here are this week's quiz:

1. What is the official language of the Democratic Republic of the Congo?
2. What are the four largest ethnic groups in then Democratic Republic of the Congo, and what percent of the population do they make up?
3. What is the population of the Democratic Republic of the Congo?
4. Who was the first European to visit the Democratic Republic of the Congo, and when did he visit the country?
5. When was the area that is now the Democratic Republic of the Congo first inhabited?
6. When did Belgium take responsibility of the Democratic Republic of the Congo?
7. Where is the Parc National de Kahuzi-Biéga?
8. What is the capital of the Democratic Republic of the Congo?
9. What is the area of the  Democratic Republic of the Congo?

That's all for today.