I fully appreciate that the challenge as constituted is indeed a challenge, for me it's probably a challenge too far. As a former engineer I can look back on engineering projects that are in the public eye, some were designed by men who were both engineers and artists, others by men who were engineers only. The difference is obvious for all to see. I would fall into the latter category.
I find it very difficult to interpret what I would call "abstract" ideas and I think I would feel uncomfortable in trying to do that, and therefore wouldn't stay the course. Likewise I wouldn't want to be one of the first 31 trying to come up with a subject for everyone else to attempt. My loss I'm sure.
Barrie