Please help me.

Q1: A set of LANs are linked using bridges to create the bridged network depicted by the figure bellow. The bridges communicate configuration BPDUs to build a spanning tree to prevent loops within the network. If all bridges start the spanning tree algorithm (all bridges are initialized), answer the following questions (assume that the circles in the figure are the bridges and the ID for each bridge is the number inside these circles. Also assume that the state of each bridge is changing in sequence according to the information in each question) B3 B5 D B1 B2 F E B7 H B6 B4 a) What is the initial configuration BPDU for B6? b) What is the configuration BPDU of B2 after receiving the initial configuration BPDU of B7? c) If B3 accepted B2 as the root, what is the configuration BPDU of B3? d) If B3 accepted B1 as the root through B5, what is the configuration BPDU of B3? e) Which bridge is the designated bridge of LAN C at this time? f) Now, if B7 accepted B1 as the root, what is the configuration BPDU of B2 after receiving the new configuration BPDU of B7? g) Which bridge is the designated bridge of LAN C at this time