Arpita, Gagan, Nitin, Varsha, Shreya and Shahid are sitting in a straight line facing the north. Nitin is to the immediate left of Gagan. Shreya is between Arpita and Shahid. Shahid is at the second place from the right end. Four persons are sitting between Nitin and Varsha. Who is sitting between Varsha and Shreya?