Step-by-step explanationStep 1
given
A vector is a quantity or phenomenon that has two independent properties: magnitude and direction. The magnitude of a vector formula is used to calculate the length for a given vector and the direction of a vector is the orientation of the vector, that is, the angle it makes with the x-axis.
so
Step 1
check the magnitude y direction of the given vectors
we see that both vector have the same direction, also we can conclude that the magnitude of vector B is 3 times the magnitude of vector a
so, the answer is

I hope this helps you