Calculate following properties for the network:

A$.$ Betweenness centrality for Node D and Node B

Describe what the results mean, comparing between NodeD and B

B$.$ Diameter of the network

Please list the calculation process in detail and explain each step.

Please do not use Python.

Please answer all questions $($A and B$)$

Due to technical issues, I have asked this question four times and have not seen the answer. Please be merciful, Chegg.