Two features of emotional development in early childhood are:
1. Formation of attachment – Children begin to form strong emotional bonds with their caregivers, particularly with parents.
2. Expression of emotions – Children learn to express basic emotions such as happiness, sadness, and anger. They begin to understand and respond to emotions in others.
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.