What is the capital of the German state of North Rhine-Westphalia?

What is the capital of the German state of Lower Saxony? Hanover is the capital of which German state? What is the capital of the German state of Mecklenburg-Vorpommern? Schwerin is the capital of which German state? Düsseldorf is the capital of which German state? What is the capital of the German state of Rhineland-Palatinate? Mainz is the capital of which German state? What is the capital of the German state of Saarland?