2. As shown in Figure 1, in the isosceles right triangle $ABC$, $D$ is the midpoint of the hypotenuse $AB$, and $E$ and $F$ are points on the legs $AC$ and $BC$ respectively (excluding the endpoints). $DE \perp IF$, $AB=10$. Let $x=|DE|+|IF|$, then the range of values for $x$ is
2. $5 \sqrt{2} \leqslant x<10$