Using the attached map, find the average depth of rain (eud) over the watershed for the storm using the thiessen-polygon method

gage station annual averag precipitation (cm) storm precipitation (cm)
a 85.9 9.4
b 26.4 5.0
c 53.1 9.0
d 23.9 3.6
e 11.7 4.0
f 34.8 5.9
g 11.4 1.8
h 42.3 7.5
i 18.3 2.7
j 43.6 6.9
k 15.6 2.9