2.0 x 1019 { ) On the ares below, plot the date from this phomelectric experiment. 6 4 Kinetic Energy Frequency (K 10* Hz] (b) Determine the threshold frequency of the metal surface. (c) Determine the work function of che metal surface. (d) When light of frequency 2.0 x 10 5 hertz strikes che mecal surface, electrons of assorted speeds are ejected fromh the surface. What minimum retarding potential would be required to scop all of the electrons ejected from the surface by light of frequency 2.0 x 101 hertz? (c) Investigation reveals that some electrons ejected from the metal surface move in circular paths. Suggest s reasonable explanation for this electron behavior