I want to fork a project licensed under the Apache 2.0 license. Section 4.(b) states that:
You must cause any modified files to carry prominent notices stating that You changed the files
The original source code files do not contain any license header. So when I modify a file, how should I format the prominent notice? Is it enough to say
(c) 2000-2021 OriginalProjectName contributors
(c) 2021 My Name
Some more context: Each file in the original project has been modified by 1-4 people, depending on the file.
What should be done if I merge a patch someone else sends me? Should I add their name to the license header too?