Find the Laplace transform of the periodic waveform shown in <image 1>.
['[(1 - e^{-s(T/2)}) / {s(1 - e^{-sT})}]', '[(2 - e^{-s(T)}) / {s(1 - e^{-sT})}]', '[(1 - e^{-s(T/2)}) / {s(1 - e^{-sT})}]', '[(1 - e^{-s(T/3)}) / {s(1 - e^{-sT})}]']