Arrange the following increasing order of their boiling point:
`C_(4)H_(9)-NH_(2),(C_(2)H_(5))_(2)NH,C_(2)H_(5)N(CH_(3))_(2)`.

Explanation

To determine the increasing order of boiling points for the compounds \(C_4H_9NH_2\), \((C_2H_5)_2NH\), and \(C_2H_5N(CH_3)_2\), we need to analyze the intermolecular forces, particularly focusing on hydrogen bonding.

### Step-by-Step Solution:

1. **Identify the Compounds**:
- \(C_4H_9NH_2\) (Butylamine)
- \((C_2H_5)_2NH\) (Diethylamine)
- \(C_2H_5N(CH_3)_2\) (Ethylmethylamine)
...