Read the following coded relationships and answer the question: M5N means M is the mother of N M4N means M is the father of N M6N means M is the son of N M8N means M is the daughter of N In the equation P5Q4R8S, how is P related to S?

Pankaj (Male) pointed to a girl and said, 'Her paternal grandfather's only son's wife is my mother.' What is Pankaj's relation to that girl?

A + B means 'A is the wife of B'; A - B means 'B is the daughter of A'; A × B means 'B is the brother of A'; A ÷ B means 'A is the father of B'. If P + R × T - Q + S ÷ U, then how is P related to the mother of U?