c$)$ Consider a string of input bits to be transmitted over a telephone line using PCM encoding. The bit stream is given by: $[10001011].$ Plot the Unipolar Retum$-$to$$

Zero and Bi$-$phase Space line coding for the input binary sequence. Which technique of these two line$-$coding schemes $($Unipolar Return$-$to$-$Zero and Bi$-$phase Space$)$ is

better and give reasons.