Sum of Elements between k1'th and k2'th smallest elements

Easy

Given an array of integers and two integers k1 and k2, find the sum of all elements between the k1'th and k2'th smallest elements of the array.

1Example 1

Input:

{
  "nums": [
    20,
    8,
    22,
    4,
    12,
    10,
    14
  ],
  "k1": 3,
  "k2": 6
}

Output:

26

2Example 2

Input:

{
  "nums": [
    10,
    2,
    50,
    12,
    48,
    13
  ],
  "k1": 2,
  "k2": 6
}

Output:

73

3Example 3

Input:

{
  "nums": [
    1,
    2,
    3,
    4,
    5,
    6
  ],
  "k1": 1,
  "k2": 6
}

Output:

14