The primary objectives of store design are:
1. Attracting customers: Store design plays a key role in drawing customers into the store. Well-designed spaces appeal to potential shoppers and encourage them to browse.
2. Enhancing customer experience: A comfortable, organized, and welcoming environment enhances the shopping experience, making customers feel at ease and more likely to spend time in the store.
3. Maximizing product visibility: A good store layout ensures that products are displayed effectively and are easy for customers to find.
4. Optimizing space usage: Efficient use of available space helps maximize product displays, while also leaving enough room for customers to move freely and comfortably.
5. Promoting branding: Store design reflects the store’s brand identity and reinforces its messaging, helping to differentiate it from competitors.
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.