Create Q1-YardCalculator.java

//A landscape designer needs a program to make calculations in meters about a front yard 
//given its width and length in feet.  Write a class YardCalculator with a constructor that takes 
//the width and length in feet as arguments
//public YardCalculator(double length, double width)

//Provide methods :

//public double perimeter() which returns the perimeter in meters
//public double area() which returns the area in square meters
//public double diagonal() which returns the diagonal in meters

//1 foot = 0.3048 meters.

//Define and use a constant for the conversion factor. Define it in the class itself, 
//outside any method, so all methods in any class can see it.

//      public static final double METERS_PER_FOOT = 0.3048;

//HINT: diagonal = square root of (width^2 plus height^2)

// Need help starting this question? In the lesson titled 
// "Starting points: Problem Set Questions", go to the
// problem titled "Problem Set 3 - Question 1" for some tips on 
// how to begin.