Vectors intro

A boat is traveling at a speed of $50$‍ kilometers per hour, in a direction that is $45\mathrm{°}$‍ to the west from the northward direction.

Here are a few vectors, where $||\overrightarrow{a}||=||\overrightarrow{b}||=||\overrightarrow{c}||=||\overrightarrow{d}||=50{\displaystyle \frac{\text{km}}{\text{h}}}$‍: