Context: As a result, in 1979, Sony and Philips set up a joint task force of engineers to design a new digital audio disc. Led by engineers Kees Schouhamer Immink and Toshitada Doi, the research pushed forward laser and optical disc technology. After a year of experimentation and discussion, the task force produced the Red Book CD-DA standard. First published in 1980, the standard was formally adopted by the IEC as an international standard in 1987, with various amendments becoming part of the standard in 1996.

Question: In what year did Sony and Philips band together to design a new digital audio disc?
Answer: 1979

Question: What year was the Red Book CD-DA standard released?
Answer: 1980

Question: When did the IEC isntigate the Red Book CD-DA as an international standard?
Answer: 1987

Question: Who headed the 1979 Sony and Philips digital audio disc task force?
Answer: Kees Schouhamer Immink and Toshitada Doi

Question: Which company did Kees Schouhamer Immink work for?
Answer: Unanswerable

Question: What did the team create five years after joining?
Answer: Unanswerable

Question: What does IEC stand for?
Answer: Unanswerable

Question: Who wrote the amendments in 1996?
Answer: Unanswerable

Question: What did CD-DA stand for?
Answer: Unanswerable