For which values of xxx is the expression x−2+4−x\sqrt{x-2} + \sqrt{4-x}x−2+4−x defined as a real number?
x≥4x \geq 4x≥4
x≤2x \leq 2x≤2
2≤x≤42 \leq x \leq 42≤x≤4
x≥2x \geq 2x≥2 or x≤4x \leq 4x≤4