فَاطِمَةُ هِيَ الْمُجْتَهِدَةُ.
Fāṭimah is the nominative subject; hiya is a feminine singular separator; al-mujtahidatu is the nominative predicate.
الطَّالِبَانِ هُمَا النَّاجِحَانِ.
Aṭ-ṭālibāni is the nominative dual subject; humā is the dual separator; an-nājiḥāni is the nominative dual predicate.
These are supplementary examples illustrating the source’s agreement rule.