Misc: what country is home to the bank of alexandria?

Questions

Who directed the monochrome (sepia) sequences at the beginning & end of "the wizard of oz" (1939)?

Who is "America's sweetheart"?

Who made stars of fanny brice & w.c. fields?

Who played private detective philip marlowe in the 1946 film "the big sleep?

Who played richie in happy days?