выберите местоимение которое подходит к данному предложению

Nikita brought his/him puppy to the stadium
Kostya lives in Moscow. It is him/his native country
Ivan helped his/him parents to do the housewor last Saturday
Max visited her/his Granny last week

homework)

Nikita brought his puppy to the stadiumKostya lives in Moscow. It is his native countryIvan helped his parents to do the housewor last SaturdayMax visited his Granny last week