Figure shows the graph of elastic potential energy \( (U) \) stored versus extension, for a stee...

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Figure shows the graph of elastic potential energy \( (U) \) stored versus extension, for a steel wire \( \left(Y=2 \times 10^{11} \mathrm{~Pa}\right) \) of volume \( 200 \mathrm{cc} \). If area of cross-section \( A \) and original length \( L \), then
(a) \( A=10^{-4} \mathrm{~m}^{2} \)
(b) \( A=10^{-3} \mathrm{~m}^{2} \)
(c) \( L=1.5 \mathrm{~m} \)
(d) \( L=2 \mathrm{~m} \)
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