Which state is the smallest by area?

Which state's residents are called "Hoosiers"? Which state's residents are called "Buckeyes"? Which state's residents are called "Sooners"? Which state is the largest by area? Which state has the largest population? Which state has the smallest population? Which is the second-largest state by area? Which was the first state to ratify the U.S. Constitution, on December 7, 1787?