Find the vector from origin to the mid-point of the vector `vec(P_1P_2)` joining the points `P_1` (4,3) and `P_2`(8, -5).

Explanation

`P_1` = (4,3) and `P_2` = (8, -5)
If P is the mid-point of `P_1P_2` then P = (6, -1).
Position vector of P = `vec(OP)` = `6hati-hatj`