The projection of $\vec{a} = 3\hat{i} + 5\hat{j} + \hat{k}$ on $\vec{b} = 2\hat{i} + 3\hat{j} + \hat{k}$ is

Question

$\frac{8}{\sqrt{35}}$

$\frac{8}{\sqrt{39}}$

$\frac{\sqrt{14}}{8}$

$\frac{22}{\sqrt{14}}$

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