URGENT HELP NEEDED IN UNIX C PROGRAMMING

Write a script called ‘my_which’ that does the same thing as the Unix which command, but do it using a for loop over an if. Obviously, DO NOT call bash’s built-in `which` in your solution. ) Write a script called dircheck that takes one or more directory names as argument and displays the following information about each directory argument: display a count of the number of subdirectories anywhere under this directory. display a count of the number of files in the directory. list all of the files in the directory that are zero length (you may use the ‘find’ command for this) use ‘du’ to display the amount of storage space used by this directory To test your script, you should create some subdirectories, some files that are zero length, using touch, and some files that are not zero length using vi, output redirection, or cp. Example of use $ dircheck  ~/hw ~/bin (50 Write a bash script called `my_find` that does a subset of the find command. Obviously, DO NOT use `find` in your solution. You must handle (at least) the following options as described in the manual for find (and these will be tested for grading): -name (you should handle patterns for names), -type (f and d), -print, and -exec (you must handle {} for exec (hint: use sed), but you may assume the exec, if present, is always the last argument and, therefore, need not be terminated by a semicolon. Note also the predicates can come in any order and are implicitly short circuit ANDed together. You need not handle -o which is OR.  Here is a sample command:  $ my_find $HOME -name ‘*.o’ -type f -print -exec /bin/mv {} ~/.TRASH \;