Q$\mathrm{.}3$Set.$($A$)($A$)$ In the following case, tell whether the $2-$ray model could be applied, and explain why or why not: ht$=35$ m$,$ hr $=3$ m$,$ d $=250$ m $[1]$

$($B$)$ Trunking efficiency decreases in cell sectoring $.$ Why? $[1]$

$($ C $)$ If the co$-$channel reuse ratio is high, what happens to the transmission quality of the signal

why? $[1]$

$($d$)$ Which techniques is used to increase capacity when a cell gets overcrowded, resulting in congestion and lower quality of service?why?Explain