What is the club system, discuss its origin

$2.$ How did thoroughbred racing evolve, what was the Jockey Club

$3.$ Discuss the history of the Olympic Games

$4.$ Explain how professional profit$-$oriented leagues developed, who was William Hulbert? What team was considered the first professional team?

$5.$ Who were James A Mason and Walter O'Malley and what did they do

$6.$ Who were E$.$B$.$ Henderson, Effa Manley, Billie Jean King, and Mark H McCormack and what did they do