How large is the electron deflection when impinging on a screen placed in the distance s to the plate capacitor?

In technical applications for example an oszilloscope a screen is placed in distance $$s$$ after the plate capacitor. This screen shows the impinge of electrons. So now the deflection $$\Delta y_{\rm{screen}}$$ of the electrons at the screen must be calculated.

Electrons are leaving the plate capacitor (see picture) with an deflection of $$\Delta y_1=2.4\,\rm{cm}$$. The electron velocity in x-direction is $$v_x=4.20\cdot 10^7\,\rm{\frac{m}{s}}$$ ans in y-direction $$v_y=1.68\cdot 10^7\,\rm{\frac{m}{s}}$$. The distance between the end of the capacitor and the screen is $$s=8\,\rm{cm}$$.
• Calculate the electron deflection $$\Delta y_{\rm{screen}}$$ when impinging on the screen.
• Explain how the deflection on the screen from task a) changes when you double the distance $$s$$ of the screen from the end of the plate capacitor.