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.