Rank of a linear map

Let $T : \mathbb{R}^{3} \to \mathbb{R}^{3}$ be a linear map defined by $T(x_1, x_2, x_3) = (3x_1 + 5x_2 + x_3, \; x_3, \; 2x_1 + 2x_3)$. Then the rank of $T$ is equal to __________ (answer in integer).