1. (i) Tips for Proper Storage of a Silk Scarf:
1. Store in a Cool, Dry Place: Keep the silk scarf in a cool and dry area, away from direct sunlight, to avoid fading and deterioration.
2. Use a Silk Bag or Box: Store the scarf in a silk or cotton bag, or a box with soft lining to protect it from dust and moisture.
3. Avoid Hanging: Do not hang the silk scarf as it may stretch and lose its shape.
4. Roll Instead of Folding: Rolling the scarf gently prevents creases and helps maintain its original form.
2. (ii) Finishing Agent for Silk Scarf: Use a mild starch solution to bring shine and a crisp look to the scarf without damaging the delicate fibers.
On the day of her examination, Riya sharpened her pencil from both ends as shown below. 
The diameter of the cylindrical and conical part of the pencil is 4.2 mm. If the height of each conical part is 2.8 mm and the length of the entire pencil is 105.6 mm, find the total surface area of the pencil.