Consider the scenario shown in the Figure below, in which there are four wireless nodes, A$,$ B$,$ C$,$ and D$.$ The radio coverage of the four nodes is shown via the shaded ovals; all nodes share the same frequency. $-$ When A transmits, it can only be heard$/$received by B; $-$ when B transmits, both A and C can hear$/$receive from B; $-$ when C transmits, both B and D can hear$/$receive from C; $-$ when D transmits, only C can hear$/$receive from D$.1.$ Suppose that $\backslash ($ A $\backslash )$ sends a message to $\backslash ($ B $\backslash ),$ and $\backslash ($ C $\backslash )$ sends a message to $\backslash ($ D $\backslash ),$ at the same time. a$.$ Will there be any collision between the two messages? $($Yes or NO$)$ b$.$ Why $($i$.$e$.$ explain your answer$)?2.$ Suppose that $\backslash ($ A $\backslash )$ sends a message to $\backslash ($ B $\backslash ),$ and $\backslash ($ D $\backslash )$ sends a message to $\backslash ($ C $\backslash ),$ at the same time. a$.$ Will there be any collision between the two messages? $($Yes or NO$)$ b$.$ Why $($i$.$e$.$ explain your answer$)?3.$ Suppose that $\backslash ($ B $\backslash )$ sends a message to $\backslash ($ A $\backslash ),$ and $\backslash ($ D $\backslash )$ sends a message to $\backslash ($ C $\backslash ),$ at the same time. a$.$ Will there be any collision between the two messages? $($Yes or NO$)$ b$.$ Why $($i$.$e$.$ explain your answer$)?$