The third statement reflects the similarities between Bill Gates and Andrew Carnegie. The third statement mentioned about the occupation of Gates and Carnegie and emphasizes how they excel on their respected fields. The third statement indicates the how they were the tycoons in their respected time.
section4. In 1865 President Andrew Johnson implemented a plan of Reconstruction that gave the white South a free hand in regulating the transition from slavery to freedom and offered no role to blacks in the politics of the South
The Missouri Compromise was meant to create balance between slave and non-slave states. With it, the country was equally divided between slave and free states. Admitting Missouri as a slave state gave the south one more state than the north. Adding Maine as a free state balanced things out again.