Pointing to a gentleman,Deepak said,"His only brother is the father of my daughter's father." How is the gentleman related to Deepak?

Deepak said to Nitin,"That boy playing with the football is the younger of the two brothers of the daughter of my father's wife." How is the boy playing football related to Deepak?

If $A * B$ means $A$ is the mother of $B$; $A + B$ means $A$ is the brother of $B$; $A \times B$ means $A$ is the son of $B$ and $A - B$ means $A$ is the daughter of $B$,which of the following means $C$ is the niece of $D$?

$I.$ $A , B , C , D , E$ and $F$ are six members of a family.

$II.$ One couple has parents and their children in the family.

$III.$ $A$ is the son of $C$ and $E$ is the daughter of $A$.

$IV.$ $D$ is the daughter of $F$ who is the mother of $E$.

Who are the male members in the family?

Following questions are based on the information provided below:
$A \times B$ means $A$ is mother of $B$.
$A - B$ means $A$ is brother of $B$.
$A + B$ means $A$ is sister of $B$.
$A \div B$ means $A$ is father of $B$.
Which of the following means $F$ is paternal grandfather of $H$?

Introducing Rajesh,Neha said,"His brother's father is the only son of my grandfather." How is Neha related to Rajesh?