For MatLab, trying to plot this onto the graph with these 3 equations onto one single graph. But not showing anything when trying. Needing helping

x=linspace(0,2.*10^(-9)); y1=-(1.6.*10^(-19).*1.763)./(4.*pi.*(8.85.*10^(-12)).*(0.352.*10^(-9))); y2=-(1.6.*10^(-19).*1.763)/(4.*pi.*(8.85.*10^(-12)).*(0.352.*10^(-9))).*(1-1/9); y3=(7.442.*10^(-5))/(0.352.*10^(-9)^9).*10^(-81);

figure(1) plot(x, y1) hold on plot(x, y2) plot(x, y3) hold off grid