Plot a unit step function y(t)

Hello MATLAB gurus. I would like to plot the following step function. I would greatly appreciate you showing me how to do it with both heaviside and one other technique. Please and thank you.

y(t)=(4/3)[1-e^(-3t/2)]u(t)-(2/3)[1-e^((-3/2)(t-1))]u(t-1)