For the three-bus lossless power network shown in the figure, the voltage magnitudes at all the buses are equal to 1 per unit , and the differences of the voltage phase angles are very small. The line reactances are marked in the figure, where , and  are strictly positive. The bus injections  and  are in pu. If , where , and the real power flow from bus 1 to bus 2 is , then which one of the following options is correct?