[Answer] What do Alexander the Great, Winston Churchill, Queen Elizabeth I and Florence Nightingale have in common?

Step 1 : Introduction to the question "What do Alexander the Great, Winston Churchill, Queen Elizabeth I and Florence Nightingale have in common?"

...Most people associate the Irish with red hair and freckles. In reality, only about 10 percent of the Irish people are redheads. Red hair has long been surrounded by myth, both good and bad. During the Middle Ages, for examples, redheads were often accused of practicing witchcraft or being vampires. The redheaded Queen Elizabeth I made red hair fashionable. She wasn't alone: history gives us many memorable redheads, like Alexander the Great, Winston Churchill and Florence Nightingale. Source: IrishCentral.com

[Ans] What problem did Winston Churchill, Thomas Edison, Albert Einstein and General George S. Patton have in common?

Step 1 : Introduction to the question "What problem did Winston Churchill, Thomas Edison, Albert Einstein and General George S. Patton have in common?"

Winston Churchill was a British politician and statesman who served as the Prime Minister of the United Kingdom from 1940 to 1945 and again from 1951 to 1955.

Thomas Alva Edison was an American inventor and businessman, who has been described as America's greatest inventor.

Albert Einstein was German-born theoretical physicist. Einstein developed the theory of relativity, one of the two pillars of modern physics. 

George Smith was a senior officer of the United States Army who commanded the U.S. Seventh Army in the Mediterranean and European theaters of World War II.