Какой частью речи является слово people's

Существительное конечно же

Where you were in the morning? i and other engineers of our office were at plant. there is a lot of new equipment. we have to sign the contract with foreign firm on it оборудование.2. here yesterday there were catalogs and price-lists. i would like them посомтртеь. you can give me them? yes, certainly. 3. on a table of the director there is phone, but on other tables of phones нет.4. how many letters on a table at the secretary? there only two letters. where other letters? they on a table of mister of doronina.5. there is a new equipment at this plant? yes. this plant buys the new equipment everyone год.6. there are no letters from robert and to firm. where they? i would like to see them now. they on a table of the secretary. you can take them

1.usually they have lunch at the office.  they are having lunch et the office. 2.sometimes they have parties in the country.  they are having parties in the country. 3.they often invite their friends to them.they are inviting their friends to them. 4.they seldom give us their book.  they are giving us their book. 5.i read this newspaper every week.  i'm reading this newspaper now. 6.we buy sandwiches every time there. we are buying sandwiches now . 7.they usually buy interesting books in london.they are buying interesting book in london. 8.they have a nice office in moscow. they are having a nice office in moscow.   9.we often invite them to parties. we are inviting them to parties. 10.every day they have dinner at home.they are having dinner at home now.