A. 1600
B. 900
C. 3600
D. 2500
A. 1 : 3
B. 1 : 4
C. 2 : 3
D. Data inadequate
A. 6 years 3 months
B. 7 years 9 months
C. 8 years 3 months
D. 9 years 6 months
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A. 1600
B. 900
C. 3600
D. 2500
A. 1 : 3
B. 1 : 4
C. 2 : 3
D. Data inadequate
A. 6 years 3 months
B. 7 years 9 months
C. 8 years 3 months
D. 9 years 6 months