Question: Which friend of Krzysztof Kieślowski wrote the musical score to the film known in French as "Trois colours"?
Context: Three Colors: Red (French: Trois couleurs: Rouge ) is a 1994 romantic mystery film co-written, produced and directed by Polish filmmaker Krzysztof Kieślowski.  It is the final installment of "The Three Colors Trilogy", which examines the French Revolutionary ideals; it is preceded by "" and "".  Kieślowski had announced that this would be his final film, which proved true with the director's sudden death in 1996.  "Red" is about fraternity, which it examines by showing characters whose lives gradually become closely interconnected, with bonds forming between two characters who appear to have little in common. A Short Film About Love (Polish: "Krótki film o miłości" ) is a Polish romantic drama film directed by Krzysztof Kieślowski and starring Grażyna Szapołowska and Olaf Lubaszenko.  Written by Krzysztof Kieślowski and Krzysztof Piesiewicz, the film is about a young post office worker deeply in love with a promiscuous older woman who lives in an adjacent apartment building.  After spying on her through a telescope, he meets and declares his love for this jaded woman who long ago gave up on believing in love.  She responds to his innocence by initiating him on the basic fact of life—that there is no love, only sex.  "A Short Film About Love" is an expanded film version of "", part of Kieślowski's 1988 Polish language ten-part television series, "Dekalog".  The film is set in Warsaw.  The film was selected as the Polish entry for the Best Foreign Language Film at the 61st Academy Awards, but was not accepted as a nominee. Three Colours: Blue (French: Trois couleurs : Bleu ) is a 1993 French drama film directed and co-written by Polish filmmaker Krzysztof Kieślowski.  "Blue" is the first of three films that comprise the "Three Colours" trilogy, themed on the French Revolutionary ideals of liberty, equality, and fraternity; it is followed by "" and "".  According to Kieślowski, the subject of the film is liberty, specifically emotional liberty, rather than its social or political meaning. The "Three Colours" trilogy (Polish: "Trzy kolory" , French: "Trois couleurs" ) is a three-part film series directed by Krzysztof Kieślowski.  Two of the films were made in French and one primarily in Polish: "" (1993), "" (1994), and "" (1994).  All three were co-written by Kieślowski and Krzysztof Piesiewicz (with story consultants Agnieszka Holland and Sławomir Idziak) and have musical scores by Zbigniew Preisner. The Fright of Real Tears: Krzysztof Kieślowski Between Theory and Post-Theory is a 2001 book by the Slovenian philosopher Slavoj Žižek which uses free associative film interpretation to tangentially examine the films of Polish director Krzysztof Kieślowski while avoiding the debate between cognitive film theory and psychoanalytic film theory.  It was published by the British Film Institute in 2001. Requiem for my friend is a major and the first non-film musical work composed by Zbigniew Preisner.  The composition was meant to honour the composer's late friend, the director Krzysztof Kieślowski, with whom he collaborated while working on a number of films, including the famous "Three Colours" trilogy.  The album was released in 1998 although some parts of the work must have been ready upon Kieślowski's passing as Preisner asserted in an interview that "the Requiem had accompanied Krzysztof in his last journey". The Scar (Polish: "Blizna" ) is a 1976 Polish film written and directed by Krzysztof Kieślowski and starring Franciszek Pieczka.  Filmed on location in Olechów, Poland, the film is about a man put in charge of the construction of a large chemical factory in his home town in the face of strong opposition from the townspeople who are concerned with their short-term needs.  The film received the Polish Film Festival Special Jury Prize (Krzysztof Kieslowski) and Best Actor Award (Franciszek Pieczka) in 1976.  "The Scar" was Krzysztof Kieślowski's first theatrical feature film. Three Colours: White (French: Trois couleurs : Blanc ) is a 1994 French-Polish comedy-drama film co-written, produced, and directed by Krzysztof Kieślowski.  "White" is the second in "The Three Colors Trilogy", themed on the French Revolutionary ideals, following "" and preceding "".  The film was selected as the Polish entry for the Best Foreign Language Film at the 67th Academy Awards, but was not accepted as a nominee. A Short Film About Killing (Polish: "Krótki film o zabijaniu" ) is a 1988 film directed by Krzysztof Kieślowski and starring Mirosław Baka, Krzysztof Globisz, and Jan Tesarz.  Written by Krzysztof Kieślowski and Krzysztof Piesiewicz, the film was expanded from "" of the Polish television series "Dekalog".  Set in Warsaw, Poland, the film compares the senseless, violent murder of an individual to the cold, calculated execution by the state.  "A Short Film About Killing" won both the Jury Prize and the FIPRESCI Prize at the 1988 Cannes Film Festival, as well as the European Film Award for Best Film. Personnel (Polish: "Personel" ) is a 1975 Polish television drama film written and directed by Krzysztof Kieślowski and starring Juliusz Machulski, Michal Tarkowski, and Wlodzimierz Borunski.  The film won the Grand Prize during the Mannheim International Filmfestival in October 1975 and numerous awards at national festivals, including the Grand Prix IV Koszalin Film Encounters "The Young and Film" in 1976.  The film also won the Grand Prize in the field of television films in the Third Polish Film Festival in Gdańsk in 1976, where Kieślowski was also honored by the award of journalists.  "Personnel" is Krzysztof Kieślowski's first feature-length film.
Answer: Zbigniew Preisner