• Assume that one of the instance variables of an object is a double value called weight. Write Java code for a setWeight method which does no more than assign the value of a double parameter called weight to the corresponding instance variable.
• Write Java code for a method called getWeight. This method should be accessible from outside its class, and it should return the current value of an instance variable called weight, which is declared to be a double.

What are values of gus.age, gus.weitght, and gus.precentGrowthRate at the end of the exection of the below main() method.

public class Mouse2Driver
{
  public static void main(String[] args)
  {
    Mouse2 gus = new Mouse2();

    gus.setPercentGrowthRate(5);
    gus.grow();
  } // end main
} // end class Mouse2Driver

public class Mouse2
{
  private int age = 0;              // age of mouse in days
  private double weight = 1.0;      // mouse weight in grams
  private double percentGrowthRate; // increase per day

  public void setPercentGrowthRate(double percentGrowthRate)
  {
    this.percentGrowthRate = percentGrowthRate;
  } // end setPercentGrowthRate

  public void grow()
  {
    this.weight +=
      (.01 * this.percentGrowthRate * this.weight);
    this.age++;
  } // end grow
} // end class Mouse2

Write a Java method returns a random boolean variable which returns true half the time and false the rest of the time. Use the random() method in the Math class which returns random double numbers between 0 and 1. Below is a stub.

public static boolean randomBoolean(){





}

Assume you have a Car class that declares two private instance variables, String make; and String model. Write Java code that implements a two-parameter constructor that instantiates a Car object and initializes both of its instance variables.