Draw the graph of the NRZ$-$L scheme using each of the following data streams,

assuming that the last signa$11$evel has been positive. From the graphs, guess the

bandwidth for this scheme using the average number of changes in the signal level.

Compare your guess with the corresponding entry in Table $4\mathrm{.}1.$

a$.00000000$

b$.11111111$

c$.01010101$

d$.00110011$

aa$.$ Repeat Exercise $5$ for the NRZ$-$I scheme.

bb$.$ Repeat Exercise $5$ for the Manchester scheme.

cc$.$ Repeat Exercise $5$ for the differential Manchester scheme