Number of orbitals (and electrons) in a given shell

The same question, asked 2 times: 15 May 2023 S1*, 14 May 2024 S1. Every wording below, oldest first.

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Question 1
15 May 2023 S1
81 $What is the total number of orbitals present in N shell?$
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Question 2
14 May 2024 S1
73 $Find the number of orbitals and maximum electrons respectively present in M shell?$
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