4 [15] Tree-based Group Diffie-Hellman. Consider the following tree to answer the questions. (Multipliers are given in red and blue, to prevent misunderstandings.) gn8n9 n7 n5 n6 n8 n9 nl n2 n3 n4 (a) [10] Members n2, n4, and n7 decide to leave the group and form a new one. Clearly describe all the steps for this partition and draw the new trees (b) [5] Member n9 decides to leave the group (original tree). Clearly describe all the steps. 4 [15] Tree-based Group Diffie-Hellman. Consider the following tree to answer the questions. (Multipliers are given in red and blue, to prevent misunderstandings.) gn8n9 n7 n5 n6 n8 n9 nl n2 n3 n4 (a) [10] Members n2, n4, and n7 decide to leave the group and form a new one. Clearly describe all the steps for this partition and draw the new trees (b) [5] Member n9 decides to leave the group (original tree). Clearly describe all the steps