Hola.jsx

import React from 'react';
import PropTypes from 'prop-types';

const Hola = ({firstName, lastName}) => (
  <div>
    <p>
      Hola, {firstName} {lastName}!
    </p>
  </div>
 );

Hola.propTypes = {
  firstName: PropTypes.string.isRequired,
  lastName: PropTypes.string.isRequired,
};

export default React.memo(Hola);