Answer:
The Java code is given below with appropriate comments
Explanation:
//Declare the class
public class CaloriesCount
{
 // Definition of the method
 public static double PizzaCaloriesPerSlice(
 double diameter)
 {
   // To calculate calories per count
   double caloriesPerSlice = PizzaCalories(diameter)
   / PizzaSlices(diameter);
   // return the value.
   return caloriesPerSlice;
 }
 // Definition of method to calculate pizza calories.
 public static double PizzaCalories(double diameter)
 {
   // return value
   return 2 * 3.14 * (diameter / 2);
 }
 // definition to return pizza calories.
 public static double PizzaSlices(double diameter)
 {
   return 8.0;
 }
 // start the main method.
 public static void main(String[] args)
 {
   // Call the method.
   System.out.println(PizzaCaloriesPerSlice(24));
 }
}
