Montgomery is the capital of which state?

Whose presidential library is located in West Branch, Iowa? Whose presidential library is located in Ann Arbor, Michigan? What is the two-letter postal abbreviation for Alabama? Which state uses the postal abbreviation "AL"? In what year was Alabama admitted to the Union as a state? Which state is nicknamed the "Yellowhammer State"? What is the official nickname of Alabama? What is the state bird of Alabama?