write a Perl program that performs the following tasks:

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.