We have $6$ host interfaces connected to an $8-$port physical layer hub manufactured by Mygolaret Inc. Each host interface is numbered, starting with $0,$ and each port of the hub is also numbered starting with $0.$

Device $0$ has MAC address $00-14-95-$DE$-6$A$-87$ and is connected to port $0$ of the Hub.

Device $1$ has MAC address $00-14-15-3$E$-76-42$ and is connected to port $1$ of the Hub.

Device $2$ has MAC address $0$C$-$DA$-41-9$A$-$EA$-6$C and is connected to port $2$ of the Hub.

Device $3$ has MAC address $00-20-$E$9-91-77-$AE and is connected to port $3$ of the Hub.

Device $4$ has MAC address $00-$C$0-6$E$-$F$8-$C$0-$C$5$ and is connected to port $4$ of the Hub.

Device $5$ has MAC address $54-$A$9-$D$4-1$C$-7$F$-17$ and is connected to port $5$ of the Hub.

The hub and all the host interfaces are cold$-$started, and the following Ethernet frames are sent on the network in sequence:

Frame $0($source $54-$A$9-$D$4-1$C$-7$F$-17$ destination $00-14-15-3$E$-76-42)$

Frame $1($source $00-$C$0-6$E$-$F$8-$C$0-$C$5$ destination $00-20-$E$9-91-77-$AE$)$

Frame $2($source $00-20-$E$9-91-77-$AE destination $00-14-15-3$E$-76-42)$

Frame $3($source $00-14-95-$DE$-6$A$-87$ destination $00-20-$E$9-91-77-$AE$)$

Frame $4($source $54-$A$9-$D$4-1$C$-7$F$-17$ destination $00-$C$0-6$E$-$F$8-$C$0-$C$5)$

Frame $5($source $00-20-$E$9-91-77-$AE destination $00-14-95-$DE$-6$A$-87)$

The following questions ask you to find out which of these frames will be heard at selected ports. Your answer must be a comma$-$separated list of frame numbers in the order heard at the port.

$1$a$.$ Assuming you are monitoring port $0$ of the hub, which of the frames would be heard at this port? $[1$ mark$]$

$1$b$.$ Assuming you are monitoring port $1$ of the hub, which of the frames would be heard at this port? $[1$ mark$]$

$1$c$.$ Assuming you are monitoring port $2$ of the hub, which of the frames would be heard at this port? $[1$ mark$]$

$1$d$.$ Assuming you are monitoring port $3$ of the hub, which of the frames would be heard at this port? $[1$ mark$]$