Q is the point 6,6

Write down vector PQ in column form. I got 4 over 3 (not sure how to use latex with this one)

The question:

PQRS is a prallelogram

Vector PR (not sure how to make the vector sign in latex) = 4 over 7

Find vector QS

I did -4 over -4 + 0 over 4 and got -4 over 1 as an answer.

Correct?