const people1 = [
    {firstName: 'Eileen', lastName: 'Graham'},
    {firstName: 'Peter', lastName: 'Graham'},
    {firstName: 'Jared', lastName: 'Miller'},
    {firstName: 'Robert', lastName: 'Williams'},
    {firstName: 'Robert', lastName: 'Jolley'},
    {firstName: 'Robert', lastName: 'Graham'},
    {firstName: 'David', lastName: 'Jennings'},
];
function getUniqNames(people) {
  
}

console.log(getUniqNames(people1) === ['Eileen', 'Peter', 'Jared', 'Robert', 'David']);