How to improve the resolving power of a compound microscope

The same question, asked 3 times: 4 May 2023 S1, 10 May 2024 S1, 20 Apr 2026 S2. Every wording below, oldest first.

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Question 1
4 May 2023 S1
24 $A person is observing a bacteria through a compound microscope. For better analysis and to improve the resolving power he should$
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Question 2
10 May 2024 S1
10 $A person is observing a bacteria through a compound microscope. For better observation and to improve its resolving power he should$
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Question 3
20 Apr 2026 S2
143 $To improve the resolving power of a compound microscope we should$
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Question 1