A positive point charge 50 μC is located in the plane x-y at the point with radius vector r→0=2i^+3j^ where i^ and j^ are the unit vectors of the x and y axes. The magnitude of electrostatic force F→ on a charge of 2 μC placed at the point with radius vector r→=8i^-5j^ is (Here r→0 and r→ are expressed in meter)