1,(10%) The following figure shows the fields in packets for IP fragmentation: length ID fragflag-offset - | =25104 =X =0 =0 Assume the value of the length field in IP header is 3280 bytes (the length of IP header is 20 bytes) and the network MTU is 1260 bytes. Please answer the following questions: + (a) How many small packets are produced after IP fragmentation? (b) Write down the value of fragflag, length, and offset fields in each small packet