a$)$ Considering the following parameters in location$-$aided routing $($LAR$),$

calculate the radius and coordinates of all the corners of the request zone. Then,

draw a diagram and show the requested zone and expected zone accordingly.

Location $($coordinate$)$ of source: $(6,3)$

Location $($coordinate$)$ of Destination: $(7,5)$

Average speed of destination: $3$

$t_0=2($time of the initial location$)t_1=4($time of the recent location$)$

b$)$ In part a$)$ above, which of the following three nodes is selected as the next hop of the

source node? Explain why the other two nodes are not selected.

Coordinate of A: $(6,10)$

Coordinate of B: $(7,9)$

Coordinate of C: $(5,7)$