Chapter 6.3, Problem 4E

In Exercises 3—6, verify that $\left\{{\text{u}}_1,{\text{u}}_2\right\}$ is an orthogonal set, and then find the orthogonal projection of $y$ onto Span $\left\{{\text{u}}_1,{\text{u}}_2\right\}$.

4. $\text{y}=\left[\begin{array}{c}4\\ 3\\ -2\end{array}\right],{\text{u}}_1=\left[\begin{array}{c}3\\ 4\\ 0\end{array}\right],{\text{u}}_2=\left[\begin{array}{c}-4\\ 3\\ 0\end{array}\right]$