Rock n Roll: Whose mother did Dr Hook and The Medicine Show sing about in 1972?

Questions

In 1866 Transatlantic cable laid - Pres Buchanan spoke to Queen---------- . ?

In 1893 Viscount---------- , Scotland, Governor General of Australia (1959-61), born. ?

In 1909 ---------- King of Morocco (1953, 1955-61), born. ?

In 1909 Mohammed V King of ---------- (1953, 1955-61), born. ?

In 1911 Parliament Act reduces power of House of---------- . ?