ICMP echo request

a$)$ Examine the protocol type and time to live fields in the IP packet that carries the first ICMP packet doesn't have source and destination port numbers.Why?

b$)$ Study the ICMP message and what are the fields does the ICMP packet have? Check the number of bytes for the checksum, sequence number and identifier fields

c$)$ Identify the data bytes in the request message and note the corresponding character sequence in the third pane of the wireshark window.what is contained in this data field?