4.1 Assume a list has the following configuration: (12, 23, 15, 5, 9). Write a series of Java statements using the List ADT of Figure 4.1 to delete the element with value 15. /** List ADT +/ public interface List [ /** Remove all contents from the list, so it is once again empty. Client is responsible for reclaiming storage used by the list elements. */ public void clear(); /** Insert an element at the current location. The client must ensure that the list's capacity is not exceeded. @param item The element to be inserted. */ public void insert (E item); /** Append an element at the end of the list. The client must ensure that the list's capacity is not exceeded. @param item The element to be appended. :/ public void append (E item); /** Remove and return the current element. @return The element that was removed. :/ public E remove(); /** Set the current position to the start of the list */ public void moveToStart(); /** Set the current position to the end of the list / public void moveToEnd(); /** Move the current position one step left. No change if already at beginning. */ public void prev(); /** Move the current position one step right. No change if already at end. */ public void next(); /** @return The number of elements in the list. */ public int length(); /** @return The position of the current element. */ public int currpos(); /** Set current position. @param pos The position to make current. :/ public void moveToPos (int pos); /** @return The current element. / public E getValue(); 1 Figure 4.1 The ADT for a list