For a point P in the plane, let d1(p) be the distance of the point P from the lines x−y=0 and x+y=0 respectively. The area of the region R consisting of all points P lying in the first quadrant of the plane and satisfying 2≤d1(P)+d2(P)≤4, is ___

For a point P in the plane, let d1(p) be the distance of the point P f

1.	For a point P in the plane, let d1(p) be the distance of the point P from the lines x−y=0 and x+y=0 respectively. The area of the region R consisting of all points P lying in the first quadrant of the plane and satisfying 2≤d1(P)+d2(P)≤4, is ___
Answer» For a point P in the plane, let $d_{1}$ (p) be the distance of the point $P$ from the lines $x - y = 0$ and $x + y = 0$ respectively. The area of the region $R$ consisting of all points $P$ lying in the first quadrant of the plane and satisfying $2 \leq d_{1} (P) + d_{2} (P) \leq 4,$ is ___