Теория:

Study the information about possessive pronouns and adjectives.
 
Possessive pronouns and adjectives are two different ways to show possession. Possessive Adjectives are used in this order:
 
Possessive Adjective + Noun
 
Examples:
 
Our office is big.
  
chairs-2181960_640.png
Рис. \(1\). Office
 
My flat is small but cosy.

Possessive Pronouns are used in this order:
 
Noun  +  Possessive Pronoun
 
Examples:

The bag is mine.  
luggage-1081872_640.png
Рис. \(2\). Bag
 
The shop is his.

Possessive adjectives go before the noun and possessive pronouns go after the noun. Here are some examples:       
 
This is my computer.
The car is mine.
  
fiat-4322521_640.png
Рис. \(3\). Car
 
Here is a list of the possessive adjectives and possessive pronouns:
 
Possessive adjectivesPossessive pronouns
mymine
youryours
hishis
herhers
itsits
ourours
theirtheirs
Источники:
Рис. 1. Office, 2016, https://pixabay.com/images/id-2181960/ Pixabay License CC0 Free for commercial use No attribution required
Рис. 2. Bag, 2016, https://pixabay.com/images/id-1081872/ Pixabay License CC0 Free for commercial use No attribution required
Рис. 3. Car, 2019, https://pixabay.com/images/id-4322521/ Pixabay License CC0 Free for commercial use No attribution required