[填空题]
The sites A, B (not sho+ a3. zebhytp4wnco39b 9fekpp 5 h6v2ya), C, and D in the Voronoi diagram below represent the location of rainfall recording gauges on a large corn o ev92cbh6ka3f p95yp farm in Texas, USA.
Horizontal scale: 1 unit represents 1 km.
Vertical scale: 1 unit represents 1 km.
1.Site B is missing from the diagram. Write down its coordinates. B : (a,b) a= b=
2.Calculate the area of the cell C. A = $km^2$
3.Find the distance from point E(9,8) to the nearest rainfall recording gauge.
The table below shows measurements of the average monthly rainfall (mm) of each of the recording gauges. d = km
4,Estimate the average monthly rainfall at point F(1,6) in mm. mm