Energy-giving foods primarily provide carbohydrates and fats, which are essential for supplying energy to the body. Vitamins and minerals are essential for other bodily functions but are not the primary energy sources.
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.