Hi there , would you please solve these problems real quick that would be really helpful and appreciated. Thank you. I will give you a good feedback too. ?

Light of a given wavelength is used to illuminate the surface of a metal and photoelectrons are emitted from the metal. In order to cause electrons to n_ot be ejected from the surface of this metal you should (choose one) A) use light of a shorter wavelength. B) use light of a longer wavelength. C) use light ofthe same wavelength but increase its intensity. D) use light of the same wavelength but decrease its intensity. I) in a photoelectric effect experiment, the following graph of the maximum Kinetic Energy of ejected electrons versus wavelength of the light used was obtained with two different metals. Which metal, A or B, has the smaller work function? Explain or no credit. A B K5