/*
  Users are considered eligible if they have at least two credits
  in the humanities and are over 22 years old.
*/
function getEligibleUsers(users) {
  var eligible = [];

  for (var i = 0; i < users.length; i++) {
    var user = users[i];
    var numHumanities = 0;

    for (var j = 0; j < user.credits.length; j++) {
      var credit = user.credits[j];
      if (credit.department == 'humanities') {
        numHumanities++;
      }
    }

    if (numHumanities >= 2 && user.age >= 22) {
      eligible.push(user);
    }
  }

  return eligible;
}