The hand piece of a miniature industrial grinder weighs 2.4 N, and its center of gravity is located on the y axis. The head of the hand piece is offset in the xz plane in such a way that line BC forms an angle of 25° with the x direction. Show that the weight of the hand piece and the two couples s M₁ and M₂ can be replaced with a single equivalent force. Further assuming that M₁ = 0.068 N ⋅ m and M₂ = 0.065 N ⋅ m, determine 

(a) The magnitude and the direction of the equivalent force,

(b) The point where its line of action intersects the xz plane.