As a security guard, Mohan’s duties at the gate include:
1. Monitoring entries and exits: Mohan is responsible for monitoring who enters and exits the store, ensuring that only authorized individuals can enter.
2. Checking for stolen goods: He must verify that no merchandise is being taken out of the store without proper purchase or approval.
3. Bag checks: Mohan may check customers’ bags and belongings as they leave the store to prevent theft.
4. Handling security alarms: If a security alarm is triggered, Mohan will investigate and address the issue immediately, following the store’s security protocols.
5. Ensuring safety: Mohan ensures the safety of customers and staff by maintaining a visible presence and being alert to any suspicious activity.
6. Providing assistance: He may assist customers with directions or queries, ensuring a positive and secure shopping experience.
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.