Human skin is made up of four main layers: the epidermis, dermis, subcutaneous tissue, and the deeper layers of connective tissue. These layers protect the body and regulate temperature.
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.