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class Person {

static species() {

return 'Homo sapiens';

}

static speciesSentence() {

return `Humans are classified as ${this.species()}`

}

constructor(firstName, lastName) {

this.firstName = firstName;

this.lastName = lastName;

this.hasJob = false;

}

fullName() {

return `${this.firstName} ${this.lastName}`;

}

setFirstName(firstName) {

this.firstName = firstName;

}

setLastName(lastName) {

this.lastName = lastName;

}

}

class Worker extends Person {

constructor(firstName, lastName, job) {

super(firstName, lastName);

this.job = job;

this.hasJob = true;

}

setJob(job) {

this.job = job;

}

}