IPv6 has been announced to be the next generation of IP addressing replacing IPv4. a) What's the main motivation of creating IPv6 for the replacement of IPv4? Justify and elaborate on you answer. Please also provided the main reason why IPv6 usages adoption is not as popular as it should be. b) IPv6 does not support fragmentation, describe in details how IPv6 is solving the maximum transfer unit (MTU) limitation. c) Consider you are sending a 8,000 byte IPv4 datagram into a link that has MTU size of 1500 bytes. Suppose the original datagram is ID stamped with number 999. i. How many packet fragments are generated? ii. Describe their characteristics of original and the newly generated smaller datagrams (ie. length, ID, fragflag, offset) by showing your complete calculations and drawing of the datagrams involved before and after the fragmentation process