Draw all the structural , stereo, and cyclic isomers of `C_(4) H_(6)`.

Explanation

To solve the problem of drawing all the structural, stereo, and cyclic isomers of C₄H₆, we will follow these steps:

### Step 1: Determine the Degree of Unsaturation
The degree of unsaturation (DU) can be calculated using the formula:
\[ \text{DU} = \frac{2C + 2 - H}{2} \]
Where C is the number of carbon atoms and H is the number of hydrogen atoms.

For C₄H₆:
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