I want to know the answer to the following question:
Who wrote the supplemental material added to the Lectures book in 2005?
All the background I'm provided with is that "They were edited and supplemented in 2005 with "Feynman's Tips on Physics: A Problem-Solving Supplement to the Feynman Lectures on Physics" by Michael Gottlieb and Ralph Leighton (Robert Leighton's son), with support from Kip Thorne and other physicists.". Is that enough to answer the question?
Answer: yes