Consider the scenario from $2\mathrm{.}4\mathrm{.}1$ Ethernet Learning Algorithm:

The following packet transmissions occur:

$$ A sends to B

$$ B sends to A

$$ C sends to B

Now suppose that, before each packet transmission above, the sender first sends a broadcast packet, and the destination then sends a unicast reply packet $($this is roughly the ARP protocol, used to translate from IPv$4$ addresses to Ethernet physical addresses, $10\mathrm{.}2$ Address Resolution Protocol: ARP$).$ After the three transmissions listed above, what destinations do the switches S$1-$S$5$ have in their forwarding tables?