Two activities of motor development in a 3 to 6-year-old child are:
1. Running and jumping – At this age, children develop their gross motor skills, enabling them to run and jump with more coordination and speed.
2. Drawing and building – Fine motor skills improve, allowing children to hold a pencil to draw and stack blocks to build structures.
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.