Question: Are both Ralph Ceder and Norman Foster a film director?

Context paragraphs:
Wife Savers: Wife Savers is a lost 1928 American comedy silent film directed by Ralph Ceder and written by Thomas J. Geraghty, Grover Jones, George Marion Jr. and Arthur Wimperis.  The film stars Wallace Beery, Raymond Hatton, ZaSu Pitts, Sally Blane, Tom Kennedy and Ford Sterling.  The film was released on January 7, 1928, by Paramount Pictures.

Strictly Illegal: Strictly Illegal is a 1935 British comedy film directed by Ralph Ceder and starring Leslie Fuller, Betty Astell and Georgie Harris.  It was made at Cricklewood Studios.

Ralph Ceder: Ralph Carl Ceder (February 2, 1897 – November 29, 1951) was an American film director and writer.  He directed 88 films in the 1920s, 1930s, and 1940s.

She Had to Choose: She Had to Choose is a 1934 American film directed by Ralph Ceder.  A romantic comedy/ crime drama, it is set in California during The Depression.

Captain Bill: Captain Bill is a 1936 British comedy film directed by Ralph Ceder and starring Leslie Fuller, Judy Kelly and Hal Gordon.  A barge operator helps a schoolteacher tackle a gang of criminals.

Norman Foster (director): Norman Foster (born Norman Foster Hoeffer, December 13, 1903 – July 7, 1976) was an American actor, film director and screenwriter.

A Fool's Advice: A Fool's Advice is a 1932 American film directed by Ralph Ceder.  The film is also known as His Honor the Mayor (American alternative title) and Meet the Mayor (American reissue title).

Dumb Dicks: Dumb Dicks (1932) is an American Pre-Code comedy film directed by Ralph Ceder and starring Benny Rubin.

Orient Express (1934 film): Orient Express is a 1934 American drama film directed by Paul Martin and starring Heather Angel, Norman Foster and Ralph Morgan.  It is based on the 1932 novel "Stamboul Train" by Graham Greene.

Walls of Gold: Walls of Gold is a 1933 American drama film directed by Kenneth MacKenna and starring Sally Eilers, Norman Foster and Ralph Morgan.

Supporting paragraphs: Ralph Ceder Norman Foster (director)
Answer: yes