Length attribute

Add a public integer attribute in the class$$List$$called$$length$$that keeps track of how many elements we have in the list. Modify all the existing methods in this class to make sure that the length is updated properly. For example, in the functions inserting new elements in the list, you should increment the length, and in those removing an element you should decrease it$.$ Modify the function$$printNodes$$to add a statement at the beginning telling us how many elements we have in the list based on the length. In all the other methods you implement for the homework, also make sure to update the length properly.

Increment values

Add a method in the class$$List$$with the header $($signature$)$

public void incrementValues$()$that traverses the list and increments the value of every node by $1.$ This function should not output anything and should not insert or remove nodes from the list. Add a test case for it in the$$main$.$

Search by value

Add a method with the header

public Node searchValue$($int val$)$

to the class$$List$.$ This method should traverse the list and search the nodes for the value passed in as parameter. If the value is found in the list, the method should return a reference to the node containing it$.$ If the value is not in the list, or if the list is empty, the meth