Draw the structures of the following :
(I ) 3-Bromo -4- phenylpentanoic acid (ii ) Hex -2- en 4- ynoic acid

Explanation

To draw the structures of the given compounds, we will follow a systematic approach for each compound.

### (i) Structure of 3-Bromo-4-phenylpentanoic acid

1. **Identify the main chain**: The name "pentanoic acid" indicates a five-carbon chain with a carboxylic acid (-COOH) functional group. The carboxylic acid is included in the main chain.

2. **Draw the carbon chain**: Start by drawing a straight chain of five carbon atoms:
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