Write all the ring-chain isomers of (a) pent-1-ene and (b) Pent-1-yne.

Explanation

To find the ring-chain isomers of pent-1-ene and pent-1-yne, we need to identify both the acyclic (open-chain) and cyclic forms of these compounds.

### Part (a): Ring-Chain Isomers of Pent-1-ene

1. **Identify the Structure of Pent-1-ene**:
- Pent-1-ene has the molecular formula C5H10 and the structure:
```
CH2=CH-CH2-CH2-CH3
...