$($c$)$ Figure Q$\mathrm{.}3($c$)$ shows non return to zero $($NRZ$)$ and return to zero $($RZ$)$ bipolar line coding techniques for bit sequence $\text{'}101011\text{'}.$ If the bits produced are at $1$ Mbps rate,

$($i$)$ Determine the bit period and duty cycle for both RZ bipolar and NRZ$.$

$(3$ marks$)$

$($ii$)$ Discuss the advantage and disadvantage of RZ bipolar over NRZ in terms of bandwidth and synchronization.

$(3$ marks$)$

$($iii$)$ Return to zero alternate mark inversion $($RZ$-$AMI$)$ line coding technique is superior in its built$-$in error detection feature. Encode the bit sequence in Figure Q$\mathrm{.}3($c$)$ using RZ$-$AMI.

$(3$ marks$)$

Figure Q$\mathrm{.}3($c$)$