1. (i) Importance of Meal Planning:
1. Reduces Wastage: Meal planning helps in utilizing leftovers, reducing food wastage and saving money.
2. Ensures Balanced Diet: It allows the person to plan for a variety of foods, ensuring a balanced diet with the right proportion of proteins, carbs, and vitamins.
3. Saves Time and Effort: By planning meals in advance, a person can save time and effort in deciding what to cook each day, making meal preparation easier.
2. (ii) Ways to Utilize Leftover Rice:
1. Fried Rice: Stir-fry the leftover rice with vegetables, eggs, and some soy sauce to make fried rice.
2. Rice Pudding: Use leftover rice to make a delicious rice pudding by cooking it with milk, sugar, and cardamom.
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.