For a symmetric airfoil at an angle of attack of $10^{\circ}$, assuming thin airfoil theory, the magnitude of the pitching moment coefficient about the leading edge is________ (round off to 2 decimal places).
For a symmetric airfoil at an angle of attack of $10^{\circ}$, assuming thin airfoil theory, the magnitude of the pitching moment coefficient about the leading edge is________ (round off to 2 decimal places).