What is the behavior of the method set which is included in KWArrayList class? The method heading: public E set (int index, E newValue) Replace the element at the specified index with the newvalue and returns the old value. Replace the element at the specified index with the newvalue and returns the newvalue. Return the first occurrence of the obj from the list, if present and return true, else return false Insert a new element at the specified index in the list and return it