write a shell script that will count total size of files which size is an odd or an even number (depending on the parameter given in the command line at the time the script is executed). Your script will be executed in the command line as: scriptname dir name odd to calculate total size of all files of odd size. scriptname dir name even to calculate total size of all files of even size. Suppose you've got the following directory structure: -a.txt (size 5 bytes) L-b.txt (size 7 bytes) L-c.txt (size 1 byte) L-d.txt (size 4 bytes) For the example execution: scriptname./A odd your script should return 13 and for example, execution: scriptname./A even your script should return 4