Stress management refers to a set of techniques and practices used to manage and reduce the impact of stress. It involves identifying stressors, managing emotional reactions, and implementing strategies to cope with stressful situations. Common techniques include mindfulness, physical exercises, time management, relaxation methods, and seeking social support. By managing stress effectively, individuals can maintain emotional well-being and prevent physical health problems.
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.