Question 1
Mateo and Logan are brothers. Meera is the child of Mateo. Nitin is the child of Meera. Nisha is the child of Logan. How is Nitin related to Nisha?
Nitin is a grandchild of Mateo, and Nisha is a child of Logan (brother of Mateo). Since Nitin is one generation further than Nisha from their common ancestors, they are first cousins once removed.