Product the major product in the following reactions:
i. `C_(6) H_(6) + (CH_(3))_(2)CHCH_(2) OH overset(H_(2)SO_(4))(rarr)...`
ii. `C_(6) H_(5) C_(2) H_(5) overset((i) Br_(2) "heat light")underset((ii) NaCN)(rarr)....`

Explanation

To solve the given reactions step by step, let's analyze each reaction separately.

### Reaction 1:
**Given:**
\[ C_6H_6 + (CH_3)_2CHCH_2OH \overset{H_2SO_4}{\rightarrow} ? \]

**Step 1: Identify the reactants.**
- Benzene (\(C_6H_6\)) is a stable aromatic compound.
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