Write a recursive method to calculate the sum of all elements in an array.

Requirements

$1.$ Write a method int sumArray$($int$[]$ arr, int n$)$ that recursively sums the first n elements of

the array.

$2.$ Base case: If n is $0,$ return $0($sum of an empty array$).$

$3.$ Write a main$()$ method to test the recursive array sum with different arrays.