Total number of particles in a bcc, fcc or base-centred unit cell

The same question, asked 3 times: 2 May 2023 S1*, 9 May 2023 S1*, 16 May 2023 S2. Every wording below, oldest first.

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Question 1
2 May 2023 S1
52 $What is the total number of particles present in bcc unit cell?$
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Question 2
9 May 2023 S1
76 $What is the total number of atoms present in fcc unit cell?$
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Question 3
16 May 2023 S2
91 $What is the total number of particles present in base centred unit cell?$
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