Which of the following is not a rule for forming the preterit of hacer?

○The root is changed to hic.

○Accents aren't used on any of the preterit forms.

○The root is changed to hiz- for él, ella and Ud. forms.

○ The endings -e, -iste, -o, -imos, -isteis, or -ieron are added.

○The endings -i, -aste, -io, -amos, -asteis, or -aron are added.