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1. Add method to your lists classes that will calculate the product of all the elements.
2. Add a method to return a copy of your list.
3. Add a method to return all the positve values in the list. 
4. Add methods to return the largest/smallest element of the list.  
   • Integer.MAX_VALUE and Integer.MIN_VALUE are static fields of the Integer class that will give you the largest and smallest possible integer values in Java.
   • For simplicity's sake, just return the appropriate value above in the situation where no min or max value exists in the list.   We will learn how to throw exceptions later.

More List Exercises

A Scheme-like String representation of lists.

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