Coordinate Geometry

Step 1: The -plane consists of all points where the -coordinate is zero. Step 2: The planes and represent the -plane and -plane respectively. Final Answer:

Step 1: Use the distance formula between two points in 3D space: Step 2: Substitute the coordinates: Wait — answer looks like 13, which is option (A). Let me double-check. --- Correction: Distance is , so correct answer is (A). --- Final Answer: