Analyse if the pronouns and its reference are correctly indicated.

I. ‘which’ (l.06) refers to ‘catalogue’ (l.05).

II. ‘who’ (l.08) refers to ‘David Wilkinson and Ognjen Apic’ (l.08).

III. ‘that’ (l.18) refers to ‘shows’ (l.18).

IV. ‘it’ (l.25) refers to ‘Google Chrome’ (l.25)

Which ones are INCORRECT?