In Young's double slit experiment, the ratio of amplitude of light coming from two slits is \( 2: 3 \). If \( I_{0} \) be the maximum intensity, the resultant intensity \( I \) when they interfere at path difference \( \lambda / 3(\lambda= \) wavelength of light \( ) \) will be
(1) \( \frac{3 I_{0}}{25} \)
(2) \( \frac{6 I_{0}}{25} \)
(3) \( \frac{7 I_{0}}{25} \)
(4) \( \frac{9 I_{0}}{25} \)