perl programming, homework help

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To become familiar with Perl programs and to see how to interact with the operating system, write a Perl program that performs the following tasks:

  • Generate a menu to ask the user for the task that he or she would like to see performed.
  • The available tasks are as follows:
    • Show current date and time.
    • Show users currently logged in.
    • Show the name of the working directory.
    • Show the contents of the working directory.
  • Prompt the user for the choice, and perform the system command.

Also, describe how variables in Perl are handled, specifically with respect to the need for declaration and type casting.