Please do all three questions thank you

recive data, but not at the same time Each switch port is connected to at least two hosts d. 6. Identify whether each MAC address is valid or invalid. If invalid, give a reason. a. 12-34-56-78-90-AB-CD b. 12-34-56-78-90-01 c. 12-34-56-78-90 e. 12-34-56-78-90-GH 13. Your boss wants to upgrade vour full-duplex switched Ethernet local area network from 100BaseT to 1000BaseT. a. Assume the existing NICs in your hosts are full-duplex and operate at 10Mbps and 100Mbps. Will you need to upgrade the NICs to be able to run at 1000 Mbps? and Assume the existing switch is full duplex and operates at 10Mbps, 100 1000Mbps. Will you need to upgrade the switch to be able to run at 1000 Mbps? b