If $X$ is the brother of the son of $Y$'s son,how is $X$ related to $Y$?

All the six members of a family $A, B, C, D, E$ and $F$ are travelling together. $B$ is the son of $C$ but $C$ is not the mother of $B$. $A$ and $C$ are a married couple. $E$ is the brother of $C$. $D$ is the daughter of $A$. $F$ is the brother of $B$. Who is the mother of $B$?

Showing the man receiving the prize,Saroj said,"He is the brother of my uncle's daughter." Who is the man to Saroj?

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 $R$ is maternal uncle of $T$?

There are six children playing football namely $A, B, C, D, E$ and $F$. $A$ and $E$ are brothers. $F$ is the sister of $E$. $C$ is the only son of $A$'s uncle. $B$ and $D$ are the daughters of the brother of $C$'s father. How is $C$ related to $F$?

Pointing to a photograph of Hari,Vijay said,"The father of his sister is the husband of my wife's mother". How is Vijay related to Hari?