Personally, I would not spend my efforts in trying to memorise the processes listed in Rita's excercise. When I was studying, I tried to solve that exercise a couple of times, but then I gave up as I was struggling trying to remember the sequence. While moving forward with my study, I had a feeling I didn't really need to memorise those activities from the book, while I definitely found it helpful to memorise the 49 processes from the PMBOK Guide, grouped by Knowledge Area and Process Group.
What I learned from my experience, though, is that there's no need to memorise the PMBOK processes the first time you study them. In fact, I noticed it became much easier for me after the first study of the PMBOK Guide, which gave me further clarity about all the processes and the way they interact with each other. Once this became clear to me and I gained a deeper knowledge of all the key concepts, it was much easier to memorise them. For me it was the "flow" that led me to the processes, rather than the other way around—if that makes sense.
Gabriella