Please assist in this Pairwise challenge

Tell us what’s happening:

Your code so far

function pairwise(arr, arg) {
  return arg;
}

pairwise([1,4,2,3,0,5], 7);

Your browser information:

Your Browser User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/64.0.3282.167 Safari/537.36.

Link to the challenge:
https://www.freecodecamp.org/challenges/pairwise