The plural of policeman is policemen.The plural possessive of player is policemen's(apostrophe before the S).E.g. The policemen's uniforms were ruined in the laundry.
The plural form of the noun policeman is policemen.The plural possessive form is policemen's.Examples: The policemen's cars formed a roadblock near the accident.
Policemen's
policeman's
Coaster's is singular possessive. The plural is coasters, the plural possessive is coasters'.
The correct form is "its" for the possessive form in the plural. "Its" is used for both the singular and plural possessive forms, without an apostrophe.
The plural is briefs. The plural possessive is briefs'.
The plural is lads. The plural possessive is lads'.
The plural is trollies. The plural possessive is trollies'.
The plural is stations. The plural possessive is stations'.
The plural is relatives. The plural possessive is relatives'.
Museum is singular. Museum's is singular possessive. Museums is plural. Museums' is plural possessive.