Analyse if the pronouns and its reference are correctly ind...

I. ‘them’ (l.32) refers to ‘This process’ (l. 31). II. ‘we’ (l.36) refers to ‘all learning styles’ (l.36). III. ‘them’ (l.40) refers to ‘grammar concepts’ (l.39). IV. ‘they’ (l.40) refers to ‘Children’ (l.39).
Which ones are correct?