Which of the following is NOT performed by the code in the firmware on a NIC when it processes data to be sent to the next point in a network? a. Determine the recipient's MAC address b. Build an Ethernet frame, adding the Recipient's MAC, adding the NIC’s own MAC as the Sender's MAC, and adding the Data c. Convert the Ethernet Frame from Binary to Electric signals and place the electrical signals or corresponding voltages on the network transmission media d. Before transmitting any data, check the network transmission media before sending data, to ensure that the media is available e. None of the above. That is, the code in the firmware on the NIC performs all of the listed tasks.