Visual merchandisers perform several functions, including:
1. Product display design: Visual merchandisers create attractive product displays to highlight items, organize them by category, and ensure they appeal to customer interests.
2. Store layout planning: They design and plan the layout of the store to optimize product placement, flow, and accessibility.
3. Seasonal promotions: Merchandisers design displays and promotions around seasons, holidays, and special events to increase foot traffic and sales.
4. Branding and signage: They ensure that the store’s visual elements align with the brand image, including the use of signage, colors, and graphics.
5. Lighting and ambiance: Visual merchandisers select appropriate lighting and use it creatively to highlight products and create a welcoming atmosphere.
6. Inventory organization: They ensure that the inventory is visually appealing and accessible to customers.
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.