给我生成一个这个题目的讲解视频---**Question Number:** 3 **Question Stem:** 如图，四条直线 y=-x-6, y=-x+6, y=x-6, y=x+6 围成一个正方形，掷一个均匀且各面上标有 1, 2, 3, 4, 5, 6 的立方体，连掷两次，以面朝上的数为点 P 的坐标 (第一次得到的数为横坐标, 第二次得到的数为纵坐标)，则点 P 落在该正方形上 (含边界) 的概率为 ( ) **Translation of Question Stem:** As shown in the figure, the four lines y=-x-6, y=-x+6, y=x-6, y=x+6 enclose a square. A fair cube with faces labeled 1, 2, 3, 4, 5, 6 is rolled twice. The number facing up on the first roll is the x-coordinate of point P, and the number facing up on the second roll is the y-coordinate. What is the probability that point P falls on the square (including the boundary)? **Options:** A. 1/2 B. 3/4 C. 4/9 D. 5/12 **Diagram Description:** * **Type:** Coordinate system with four lines. * **Coordinate Axes:** X-axis and Y-axis intersecting at the origin O. Arrows indicate the positive direction. * **Lines:** Four straight lines are shown. * y = -x + 6 (appears to pass through the positive y-axis and positive x-axis) * y = x + 6 (appears to pass through the positive y-axis and negative x-axis) * y = x - 6 (appears to pass through the negative y-axis and positive x-axis) * y = -x - 6 (appears to pass through the negative y-axis and negative x-axis) * **Shape:** The four lines enclose a square centered at the origin O. The vertices of the square are the intersection points of the lines. * **Origin:** The origin O is labeled at the intersection of the x and y axes. **Other Relevant Text:** None beyond the question and options.