Who was First Lady during Lyndon B. Johnson's presidency?

Which president served from 1963 to 1969? In what year did Lyndon B. Johnson first take office as President? Who served as Vice President under Lyndon B. Johnson? Under which president did Hubert Humphrey serve as Vice President? Lady Bird Johnson was married to which president? Which number president was Richard Nixon? Who succeeded Richard Nixon as President of the United States? Who was President immediately before Richard Nixon?