If we want a 5 week remaining schedule we could do
Week 9 as now, to p275 - 33 pgs
Week 10 to end of chapter 3, p327 - 53 pgs
Week 11 to p372 – 45 pgs
Week 12 to p420 (English sentence containing word scarf) - 52 pgs
Week 13 to end, p474 - 54 pgs
which has some better breakpoints and is more even than option 3.
The week 12 breakpoint word is a minor spoiler for chapter 3, I suspect.
We could as a variant move the week 9 endpoint forward to p286, giving 43/44/45/52/54 pages.