์˜ˆ์ „ X2 ๋ฏธ๋‹ˆ๋Š” ์—„์ฒญ ๋ฏธ๋„๋Ÿฌ์› ์—ˆ๋Š”๋ฐ ํ”ผํŠธ ํ›จ์”ฌ ๋„“๋˜๋ฐ ์–ด๋–ฐ?