A positive point charge 50 C is located in the plane xy at the point with radius

Question:

A positive point charge 50 μC is located in the plane xy at the point with radius vector r0 = 2i + 3j, where i and j are the unit vectors of the x and y axes. Find the vector of the electric field strength E and its magnitude at the point with radius vector r = 8i - 5j. Here r0 and r are expressed in meters,