In an experimental set up for measuring the photoelectric effect in metals. using laser editing incident light at a wavelength of 2.840nm. the following observations were made. For sample A no electrons were detected for sample B the kinetic energy of the electrons was 8.21X10-21j for sample c the speed of the electrons was 7.12X105 m/s and for sample D the wavelength of the electrons was1.46X10-9 m. rank the work functions (threshold energy) of these samples from highest to lowest