Arrange the following in increasing order of their basic strength:
(i) `C_(2)H_(5)NH_(2),C_(6)H_(5)NH_(2),NH_(3),C_(6)H_(5)CH_(2)NH_(2)and(C_(2)H_(5))_(2)NH`
(ii) `C_(2)H_(5)NH_(2),(C_(2)H_(5))_2NH,(C_(2)H_(5))_(3)N,C_(6)H_(5)NH_(2)`
(iii) `CH_(3)NH_(2),(CH_(3))_(2)NH,(CH_(3))_(3)N,C_(6)H_(5)CH_(2)NH_(2^.)`

Explanation

To solve the problem of arranging the given amines in increasing order of their basic strength, we will analyze each part step by step.

### Part (i): Arrange `C2H5NH2, C6H5NH2, NH3, C6H5CH2NH2, (C2H5)2NH`

1. **Identify the Compounds**:
- C2H5NH2: Ethylamine
- C6H5NH2: Aniline
- NH3: Ammonia
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