Question: Define a class modeling a Queue of Objects implemented as a singly-linked list with the following methods: a constructor to

Define a class modeling a Queue of Objects implemented as a singly-linked list 

with the following methods:

          a constructor to creat.e an empty Queue,

           a method to insert a given Object into the Queue 

           a method to delete an Object from the Queue

           a method to test for an empty Queue

           a toString method

To support this implementation, also define a second class for a Link. 

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