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

While introducing a man to her husband, a woman said his brother's father is the only son of my grandfather. How is the woman related to this man?

B is father of Q. B has only two children. Q is the brother of R. R is the daughter of P. A is the granddaughter of P. S is the father of A. How is S related to Q?

If A is the brother of B, B is the sister of C, C is the daughter of D, and D is the father of E, then how is A related to E?

If A is the sister of B, C is the brother of D, B is the daughter of C, and E is the son of A, then how is E related to D?

If X is the son of Y, Y is the brother of Z, and Z is the daughter of W, then how is X related to W?