Which of the following is a correct declaration of a variable and a call to a constructor of an ArrayList of double precision (double) numbers? Assume that the default constructor is defined....

Extracted text: Which of the following is a correct declaration of a variable and a call to a constructor of an ArrayList of double precision (double) numbers? Assume that the default constructor is defined. ArrayList numbers = new ArrayList; O ArrayList numbers = new ArrayList(); %3D ArrayList numbers = new ArrayList(); ArrayList numbers = new ArrayList(); What is the UNIX command to copy the directory classes and its entire content that is located in your home directory into classes_bkp, also in your home directory? cp -r ~/classes ~/classes_bkp copydir -/classes ~/classes_bkp cp ~/classes ~/classes_bkp cp -r HOME/classes HOME/classes_bkp