A population of 1 million packets passed through a network link during a certain time span, during which time a sample S, of 100 packets, was drawn. 1. [25 points] Let the following table give the distribution of sizes of all packets collected in S: Packet Size (in bytes) Number of Packets 100 150 4 250 25 400 15 550 25 700 15 950 1300 WUIN 1450 Total 100 What are the mean, median, range, variance, and standard deviation of the sizes of packets in S