How can i used return value of arr.splice as parameter in function

Tell us what’s happening:

Your code so far


function sumOfTen(arr) {
  // change code below this line
  let a = arr.splice(1,1);
 let b = arr.splice(3,1);
  
  // change code above this line
  return arr.reduce((a, b) => a + b);
}

// do not change code below this line
console.log(sumOfTen([2, 5, 1, 5, 2, 1]));

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Link to the challenge:
https://learn.freecodecamp.org/javascript-algorithms-and-data-structures/basic-data-structures/remove-items-using-splice