Keys from Variables in JavaScript Multidimensional Structures

Let the following object be given:

javascriptlet obj = {
  'sub1': ['11', '12', '13'],
  'sub2': ['21', '22', '23'],
};

Let's output some element from our object, for example, the element '22':

javascriptconsole.log(obj['sub2'][1]);

Now let the keys be stored in variables:

javascriptlet key1 = 'sub2';
let key2 = 1;

Let's output the element of the multidimensional structure using our variables:

javascriptconsole.log(obj[key1][key2]);

Задание 1

Given the following structure for storing a list of affairs by years, months, and days:

javascriptlet affairs = {
  '2018': {
    11: {
      29: ['name111', 'name112', 'name113'],
      30: ['name121', 'name122', 'name123'],
    },
    12: {
      30: ['name211', 'name212', 'name213'],
      31: ['name221', 'name222', 'name223'],
    },
  },
  '2019': {
    12: {
      29: ['name311', 'name312', 'name313'],
      30: ['name321', 'name322', 'name323'],
      31: ['name331', 'name332', 'name333'],
    }
  },
}

Also, let three variables be given, containing the year, month, and day. Output the affair corresponding to the values of the variables.

Задание 2

The author of the following code wanted to output the element with the value '24':

javascriptlet obj = {
  key1: {
    key2: '12',
    key3: '13',
  },
  key2: {
    key4: '24',
    key5: '25',
  },
}

let key1 = 'key2';
let key2 = 'key4';
console.log(obj['key1'][key2]);

However, the code does not output what the author expected. Correct the mistake.

Задание 3

The author of the following code wanted to output the element with the value '24':

javascriptlet obj = {
  key1: {
    key2: '12',
    key3: '13',
  },
  key2: {
    key4: '24',
    key5: '25',
  },
}

let key1 = 'key2';
let key2 = 'key4';
console.log(obj.key1.key2);

However, the code does not output what the author expected. Correct the mistake.

Задание 4

The author of the following code wanted to output the element with the value '24':

javascriptlet obj = {
  key1: {
    key2: '12',
    key3: '13',
  },
  key2: {
    key4: '24',
    key5: '25',
  },
}

let key1 = 'key2';
let key2 = 'key4';
console.log(obj.key1['key2']);

However, the code does not output what the author expected. Correct the mistake.

Задание 5

The author of the following code wanted to output the element with the value '24':

javascriptlet obj = {
  key1: {
    key2: '12',
    key3: '13',
  },
  key2: {
    key4: '24',
    key5: '25',
  },
}

let key1 = 'key2';
console.log(obj['key1']['key4']);

However, the code does not output what the author expected. Correct the mistake.