d$)$ In a WLAN installation, the maximum propagation delay is $0\mathrm{.}4$ sec $.$ The WLAN operates at a data rate of $10$ Mbps$,$ and packets have $400$ bits. Calculate the normalized throughput with three different CSMA protocols:

i$)$ unslotted nonpersistent

$($ii$)$ slotted persistent

$($iii$)$ slotted $1-$persistent CSMA.