Find the product using suitable properties. (i) `425xx136=425xx(6+30+100)` (a) commutativity under multiplication. (ii) `2xx49xx50=2xx50xx49` (b) commutativity under addition. (iii) `80+2005+20=80+20+2005` (c) Distributivity of multiplication over addition.

Explanation

To solve the question step by step, we will analyze each part and identify the suitable properties as requested.

### Step-by-Step Solution:

**(i) Find the product using suitable properties:**
- We have the equation:
\[
425 \times 136 = 425 \times (6 + 30 + 100)
...