Mira is Priya's daughter. Priya is Vivek's sister, which makes Mira, Vivek's niece. Ravi is the son of Vivek, so considering that Vivek is Mira's father's brother, Mira and Ravi are first cousins.

Sunil is married to Priya, who is Amit's daughter. This makes Sunil Amit's son-in-law because he is the spouse of Amit's daughter.
Amit has two children, Vivek and Priya. Vivek has two kids, Ravi and Neha. Priya is married to Sunil, and they have one daughter, Mira. How is Mira related to Ravi, and how is Sunil related to Amit? Make your response very short.