1. Constructors:(3) a. MyList () Pre-condition: None. Post-condition: This is the default constructor of MyList class. This constructor creates an empty list. b. MyList (int [] a) or Myst(a) Pre-condition: Array cannot be empty. Post-condition:This is the default constructor of MyList class. This constructor creates a list from an array. c. MyList (MyList a) or MyList(a) Pre-condition: List cannot be empty. Post-condition: This is the default constructor of MyList class. This constructor creates a list from another list. 2. void showList ( ) or def showList(self) (2) Precondition: None. Postcondition: Outputs the keys of the elements of the order list. If the list is empty, outputs "Empty list". 3. boolean isEmpty ( ) or def isEmpty(self) (1) Pre-condition: None. Post-condition: Returns true if a list is empty. Otherwise, returns false. 4. void clear () or def clear(self) (1) Pre-condition: The list is not empty. Post-condition: Removes all the elements from a list. 5. void insert (Node newElement) or def insert(self, newElement) (3) Pre-condition: None. Post-condition: This method inserts newElement at the tail of the list. If an element with the same key as newElement already exists in the list, then it concludes the key already exists and does not insert the key.