Q$7.$ What is the advantage and disadvantage of using Block Coding signal encoding technique? Convert the Data given below into signal using $4$B$/5$B block coding technique with $\backslash ($ M L T$-3\backslash )$ line coding scheme. The table below shows the substitution of blocks. $[6]$ Data: $10010101100$ Q$8.$ Explain how Bipolar$-$AMI scheme rules are violated in B$8$ZS Scrambling. $[2]$Q$9.$ Sometimes, bipolar encoding schemes are preferred over unipolar encoding schemes although unipolar schemes are less complex. Mention two issues of unipolar encoding that can be avoided using bipolar encoding. $[3]$Q$10.$ Why is NRZ$-$I better than NRZ$-$L$?$ Explain with proper reasons. $[3]$