Rule Detection problems

In the given figure, triangle represents the healthy, square represents the old, and circle represents the men. Find out the area of the figure which
represents the "men who are healthy but not old".

Rule: Closed figures losing their sides and open figures gaining their sides.

Rule: Any figure can be traced by a single unbroken line without retracting.

Rule: Closed figures gradually become open and open figures gradually become closed.

Rule: Closed figures become more and more open and open figures become more and more closed.

Rule: The series becomes complex as it proceeds.

Rule: Closed figures become more and more open and open figures become more and more closed.

Rule: Closed figures become more and more open and open figures become more and more closed.

Rule: The series becomes simpler as it proceeds.

Rule: As the circle decreases in size, its sectors increase in number.