Step-by-step explanation:
The diameter of the circle is 4 inches so its radius r is 2 inches. The area of the circle is

The circumference C of the circle is

Given:
Planes X and Y are perpendicular to each other
Points A, E, F, and G are points only in plane X
Points R and S are points in both planes X and Y
Lines EA and FG are parallel
The lines which could be perpendicular to RS are EA and FG.