Final answer:
After examining the overlapping instruction sequences, instructions 31-39 and 35 and 36 likely repeat across different sets, implying they refer to the same bus parts. Instructions 21-40 include these numbers, suggesting this set covers the same parts of the bus.
Step-by-step explanation:
To determine which cleaning instructions involve the same parts of the bus, we must look for overlapping number sequences in the various instruction sets provided. After reviewing the sequences, it becomes apparent that instructions 31-39 and 35 and 36 are repeating across many of the suggested instruction sets. This suggests that these numbers likely correspond to the instructions for cleaning the same parts of the bus. To give a precise answer to which set of instructions (21-40, 41-60, 61-80, or 81-100) contains these details, we need the full list of instructions, but based on the data provided, Instructions 21-40 are most likely to involve the same parts of the bus since they encompass the ranges mentioned multiple times (31-39, 35, 36).