A photon of wavelength $\lambda$ is scattered from an electron, which was at rest. The wavelength shift $\Delta\lambda$ is three times of $\lambda$ and the angle of scattering $\theta$ is $60^\circ$. The angle at which the electron recoiled is $\phi$. The value of $\tan\phi$ is: (electron speed is much smaller than the speed of light)\\
(1) 0.16\\
(2) 0.22\\
(3) 0.25\\
(4) 0.28