1. The threshold frequency (fo) to emit photoelectrons from the surface of cesium metal is 5.169x10 * Hz. An incident light with 3.01687 eV photons is shone on the metal and photoelectrons are emitted. a) Determine the maximum speed (in m/s) of the escaping photoelectrons. Answer in 3 sig digs (5 marks) b) What type of EMR (IR, Visible, UV) is the incident light? Explain your answer. Hint: Calculate the wavelength of the incident light. (2 marks)