Pointing towards a boy, a lady said, "he is only son of my father’s wife only daughter”. How is the lady related to boy?

S is the sister of T. R is the brother of S. U is the wife of W. T is the father of U. How is T related to W?

Pointing to a men, women said that he is the son of my mother's brother's father's son. Then find out how is that man related to that woman?

A and B are brothers, E is daughter of F, F is wife of F, how is E related to A?

Pointing toward’s a boy, a girl said that he is the only son of my paternal aunt's daughter. How will my brother’s only daughter is related to that boy?

Pointing to a lady in a photograph, Vijay said, “Her sister’s mother is the sister of my father’s daughter.” How is the lady related to Vijay?

Lalita's father is married to Sarita's mother. Lalita has two daughters - Priya and Gauri. Sarita has two sons Atul and Rakesh. Vivek is the father of Priya and Mangesh is the father of Rakesh. How is Lalita's father related to Atul's father?

A family has 6 members P, Q, R , S , T and U. Q is the son of R, but R is not the mother of Q. P and R are a married couple. T is the brother of R. S is the daughter of P. U is the sister of Q.

How many brothers does U have?