Suppose $\vec { u } = \vec { i } + 4 \vec { j } + 5 \vec { k }$

Essay

Suppose $\vec { u } = \vec { i } + 4 \vec { j } + 5 \vec { k }$ and $\vec { v }$ is a vector such that $\vec { u } \cdot \vec { v } = 37$ .What is the shortest length $\vec { v }$ can be?