Bernoulli U-statistic statements

Let $X_1,X_2,X_3$ be a random sample of size 3 from a population having Bernoulli distribution with parameter $p$, where $p \in (0,1)$ is unknown. Define $T_1(X_i, X_j, X_k) = X_i - X_j(1 - X_k)$, $T_2(X_i, X_j, X_k) = \frac12 (X_iX_j + X_jX_k)$, for $i,j,k = 1,2,3; i \ne j \ne k$. Let $x_1,x_2,x_3$ denote realizations from the random sample. Then which of the following statements is/are true?