Answer
$\lt -1,1 \gt$
Work Step by Step
Consider $O$ as origin and let $P$ be the mid-point of segment $RS$.
Apply mid-point formula such as:$(\dfrac{x_1+y_1}{2},\dfrac{x_2+y_2}{2})$
$P(\dfrac{x_1+y_1}{2},\dfrac{x_2+y_2}{2})=P(\dfrac{2-4}{2},\dfrac{-1+3}{2})= \lt -1,1 \gt$
$OP=P-O=\lt -1,1 \gt -\lt 0,0 \gt $
or, $OP=\lt -1,1 \gt$
