In this assignment, you are asked to write a Java class (MyNumbersClass) that calculates the average of real numbers (double) using the ArrayList. The numbers are separated by a white space and are stored in a dat file. Refer to the UML design below. Specifications: 1- The field filename stores the file that contains the numbers. 2- The default constructor sets the file name to a default String ("input.dat") and creates the ArrayList object field with a capacity of 100. 3- The second constructor assigns the value of the argument to the filename field. 4- The ReadnumbersfromFile method reads the numbers from the file and stores them in the ArrayList object field. 5- The CalcAverage method iterates over all elements in the ArrayList object field and computes the average of the stored numbers. It returns the average value to the caller