Question 1
Noah and Mei are siblings. Noah has 2 child/ren: Mateo, David; Mei has 2 child/ren: Fatima, Giulia. How many cross-cousins does Mateo have? (Cross-cousins are children of mother's brother or father's sister)
Mateo is child of Noah (father's side), so cross-cousins are children of his father's sister Mei: 2 cousins.