QZ. Calculation Characterize the snuc'ture of the social network shown below using graph theon metrics. Note: you are requested to provide the related calculation processes. Note: you are requested to provide the related calculation processes. What is the number of nodes and edges in this network? (5 points) Calculate the network's density. (5 points) Calculate the network's mean degree. (5 points} Choose the most efficient node to disseminate a piece of information to the entire social network (Hit: centralitvl. [ll] aointsl PP'F