$1($a$)($i$)$ State what a transmission line is$?$

$($ii$)$ Mention a rudimentary form of transmission line $($TL$)$ discussed in the course.

$($b$)($i$)$ List three factors that as concerns make the TL in$($b$)$ not qualify as a proper transmission line.

$($ii$)$ Mention two $(2)$ dimensions of a transmission line and what property of a wave they are related to at which the transmission line can be said to be no longer 'transparent' to the circuits at either end.

$($c$)($i$)$ List two common types of TEM transmission lines.

$($ii$)$ Using relevant schematics briefly describe what makes the lines in $($a$)$ TEM.