Consider the waveform as shown in figure the correct representation of waveform is:

• A. s(t) = 2t u(t - 1) – 2tu(t) + 2u(t - 2)
• B. s(t) = 2(t - 1) u(t - 1) + 2(t - 2) u(t - 2) + 2u(t - 2)
• C. s(t) = 2t u(t - 1) + 2(t – 2) u(t - 2) – 2 u(t - 2)
• D. s(t) = 2(t – 1) u(t - 1) – 2(t - 2) u(t - 2) – 2 u(t - 2)