Electromagnetic waves of wavelength 2.4 × 10⁻⁷ m are incident on the surface of a metal whose work function is 2.8 × 10⁻¹⁹ J.
a. Calculate the energy of a single photon.
b. Calculate the maximum kinetic energy of electrons released from the metal.
c. Determine the maximum speed of the emitted photoelectrons.

You will need these values to answer question:
Speed of light in a vacuum c = 3.00 × 108 m s⁻¹
Planck constant h = 6.63 × 10⁻³⁴ J s
Mass of electron m_e = 9.11 × 10⁻³¹ kg
Elementary charge e = 1.60 × 10⁻¹⁹ C