Consider a local area network that can transmit datagrams with the MTU size of 500 bytes. For a 2500-byte length datagram whose identification (ID) is 5320, answer the following questions: 1) Assume the sizes of IP and TCP headers are both 20 bytes. How many fragments will be generated if the IP fragmentation is applied? (1 mark) 2) For the first generated fragment, what are the values of the following four fields: fragment length, identification, fragment flag, and fragment offset, respectively? (4 marks) 3) For the last generated fragment, what are the values of the above four fields? (4 marks) 4) What is the transmission overhead of the above fragmentation mechanism? The transmission overhead can be defined as the percentage of the amount of transmitted overhead bits relative over the total amount of transmitted bits. (1 mark)