Solving a problem in physics section 66 point 86 quant

86. A flat aluminum electrode is illuminated with ultraviolet light with a wavelength of λ = 8.30 ∙ 10−8 m. What is the maximum distance from the electrode surface that a photoelectron can move away if there is an electric field delaying field of intensity E = 7.5 V / cm outside the electrode? The red border of the photoelectric effect for aluminum corresponds to a wavelength of λ0 = 33.2 ∙ 10−8 m.