'Virtual address structure calculation

I have a gap in my understanding and cant seem to understand how Virtual Address Structure is being calculated:

I have seen 2 examples that I'd love to understand:

  1. V.A : 32bits , Page Size : 4kB , entry : 4B ---> V.A structure is 10,10,12

  2. V.A : 32bits , Page Size : 4kB , entry : 8B ---> V.A structure is 2,9,9,12

I would really appreciate if someone could elaborate regarding the calculations that took place in order to extract the aforementioned structures.

memorybytevirtualbitmemory-address


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