old_contents: var Person = function(firstAndLast) {
    let nameArr = firstAndLast.split(' ');
    
    this.getFirstName = () => {
      return fullName[0];
    }
  
    this.getLastName = () => {
      return fullName[1];
    }
  
    this.getFullName = () => {
      return fullName.join(' ');
    }
  
    
  
    
  };
  
  var bob = new Person('Bob Ross');
  bob.getFullName();
  
new_contents: var Person = function(firstAndLast) {
    let nameArr = firstAndLast.split(' ');
    
    this.getFirstName = () => {
      return nameArr[0];
    }
  
    this.getLastName = () => {
      return nameArr[1];
    }
  
    this.getFullName = () => {
      return nameArr.join(' ');
    }
  
    this.setFirstName = (firs) => {
      nameArr[0] = first;
      return nameArr[0];
    }
  
    this.setLastName = (last) => {
      nameArr[1] = last;
      return nameArr[1];
    }
  
    this.setFullName = (firstAndLast) => {
      nameArr = firstAndLast.split(' ');
    }
  };
  
  var bob = new Person('Bob Ross');
  bob.getFullName();
  
subject: add make person