Wilcoxon rank-sum statistic for sample sizes 7 and 9

Let $(X_1,X_2,\dots,X_7)$ and $(Y_1,Y_2,\dots,Y_9)$ be two independent random samples from the continuous distribution functions $F(x-\mu)$ and $F(x-\theta)$, respectively, where $F$, $\mu$ and $\theta$ are all unknown. Further, let $\mu$ be the unique median of $F(x-\mu)$ and $\theta$ be the unique median of $F(x-\theta)$. Let $R_i$ be the rank of $Y_i$ in the combined sample, $i=1,2,\dots,9$. For testing $H_0:\mu=\theta$ against $H_1:\mu>\theta$, the test statistic $T=\sum_{i=1}^9R_i$ is proposed. Then, which of the following statements are true?