Potential in the space varies as V(x,y,z)=6x−8xy−8y+6yz.
Electric field is given by,
Ex=−∂x∂V=−6+8y
Ey=−∂y∂V=8x+8−6z
Ez=−∂z∂V=−6y
E=(−6+8y)i^+(8x+8−6z)j^−6yk^
Putting the value of the position we get,
E(1,1,1)=2i^+10j^−6k^
Magnitude is given by,
∣E∣=235NC−1
Force on the charge is given by,
F=qE=2×235=435N