If the addToStart method from Display 15.25 were removed, how could we still add a new node to the head of the list?  Display 15.27 does not contain a peek( ) method. Normally this method would return...

If the addToStart method from Display 15.25 were removed, how could we

still add a new node to the head of the list?

 Display 15.27 does not contain a peek( ) method. Normally this method

would return the data on the top of the stack without popping it off. How

could a user of the Stack class get the same functionally as peek( ) even

though it is not defined?