Exercise 6. Given the vectors $u_1 = (1,2,3)$, $u_2 = (4,5,6)$, and $u_3 = (7,8,9)$ in $\mathbb{R}^3$, determine if the vector $v = (14,32,50)$ is in the span of $u_1$, $u_2$, and $u_3$. Form the appropriate augmented matrix and perform row operations to find your answer.
