جَاءَتِ الطَّالِبَاتُ مَسْرُورَاتٍ
Translation: The female students arrived happy.
جَاءَتْ: past verb with feminine marker (pronounced ti in liaison).
الطَّالِبَاتُ: nominative subject, sound feminine plural.
مَسْرُورَاتٍ: accusative ḥāl, marked by kasra because it is a sound feminine plural.
Kasra here marks the accusative, not the genitive.