a. Given directory tree A, write commands to create two local variables the containing the absolute paths to - dirA in directory tree A, call it DIR_A - letc in the root directory, call it ETC b. Using the variables DIR_A and ETC, write commands to do the following - Create an etcData directory underneath DIR_A - Copy the files in ETC that end in a period followed by three letters (.ini .sfg, and so-on) into the etcData directory. You must use the DIR_A and ETC variables to do this