Method get$($int i$)$: it return the element at position i if there is an element; otherwise, it return null.

$9.$ Method display$()$: Void method that prints the elements currently in the list. A

$10.$ Method contains$($E e$)$: it returns true if the element in the list, otherwise it returns false.

$11.$ Method indexOf$($E e$)$: it returns the index of the element e in the list, otherwise it returns $-1.$

$12.$ Create Test class with main$()$ method, and create two objects of MyList, each one initially

contains $3$ elements: one of type Integer and the other one of type Character.