这是小学一年级的题，请帮我分析解答一下这道题---Extraction Content:
**Question Stem:**
附加题。(共 10 分)
把 1,2,3,4,5,6,7 这七个数填入下图中的 ○ 里, 使每条直线上三个数的和都等于 12。
**(Supplementary Question. Total 10 points)**
**Fill the seven numbers 1,2,3,4,5,6,7 into the ○ in the diagram below, so that the sum of the three numbers on each straight line is equal to 12.**
**Chart/Diagram Description:**
* **Type:** Geometric diagram.
* **Main Elements:**
* **Shapes:** 7 circles.
* **Arrangement:** One central circle and six outer circles arranged around the central circle in a hexagonal pattern.
* **Lines:** Straight lines connecting the circles. Lines connect the central circle to each of the six outer circles. Lines also connect adjacent outer circles, forming a hexagon. Three lines are explicitly drawn passing through the central circle, connecting the central circle to a pair of opposite outer circles. These three lines each contain three circles. The lines connecting adjacent outer circles only contain two circles.
* **Labels and Annotations:** No labels or annotations on the circles or lines themselves in the provided image.