The strength E of an electric field at a point with coordinates (x, y, 2:) resulting from an infinitely long charged wire lying along the y-axis is given by k 3:2 +22 Em 3;, Z) : 3 where k is a positive constant and E is measured in Newtons per Coulomb (or N/C). Assuming that k : 1, find the equation of the level surface when the magnitude of the electric field is E : 0.85 N/C. Round any decimal values in your answer to four decimal places, if necessary