Answer:
Hope this helps!
Explanation:
a. PQ
b. QU
c. RS
d. PS
e. UV
f. SR
Let's look at question A. If we follow each vector individually, we can see that PT goes across and RQ goes diagonally down (see diagram attached).
We can see that there is one line that creates a shorted path to reach the destination (Q) which is PQ. We have taken the first letter of the first vector (P from PT) and the last letter from the last vector (Q from RQ).
Because all the questions are positive, this tactic works. If any questions had a negative vector, it becomes slightly more complicated.