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 P8Q4R5S, how is P's mother related to S?

In a certain code language: 'A + B' means 'A is the son of B' 'A - B' means 'A is the brother of B' 'A × B' means 'A is the wife of B' 'A ÷ B' means 'A is the father of B' Based on the above, how is L related to P if the expression is 'L + M ÷ N × O - P'?

A man said, 'The boy playing with my son is the son of my wife's sister.' How is the boy related to the man?