Which French president resigned in April 1969 after voters rejected his referendum on regional and Senate reform?

Which Roman fought against Julius Caesar and was pardoned by him, then conspired with Brutus to murder him? Which surgeon said, "On Saturday, I was a surgeon in South Africa, very little known. On Monday I was world renowned"? In 2003, which actor reportedly signed a deal to keep playing Dr. John Carter on "ER" through the 2004–05 season? Which actor reprised his role as private eye Joe Mannix for a 1997 episode of "Diagnosis Murder"? Which actor joked, "I was typecast as a lion, and there aren't all that many parts for lions"? In Shakespeare's "Julius Caesar," who says, "As Caesar loved me, I weep for him... but, as he was ambitious, I slew him… Which nursery rhyme character said "What a good boy am I!" after pulling a plum out of his Christmas pie? Which entertainer signed off his TV show with the line "Good night, Mrs. Calabash, wherever you are"?