WJEC chi distribution question

We’ve been using excedel text books since WJEC does not want to provide us a book, and in the chi distribution section they will normally combine cells when the chi squared is <5. However looking at the past paper from 2019 they didn’t combined cells. Now I’m confused, is combining cells not required by WJEC?

It might help if you posted the actual question concerne. However, one thing that might be worth bearing in mind is that the Chi squared pooling rule applies to the expected class values rather than the observed class values.

I have attached the question along with the mark scheme

The expected frequencies are all 6.25, so none of them are <5 and hence no need to combine columns.