As collective nouns place like objects or things in single groupings, such a noun takes a singular verb.
Therefore, in the following sentences the usage of the verb ‘are’ is grammatically incorrect.
The crowd are becoming restless.
The team are playing well.
The series are about living within one’s means.
A range of antiques are to be auctioned.
Although a ‘crowd’ is comprised of many people, there is only one crowd and, therefore, the noun should take the singular verb ‘is’ and not the plural (more than one) verb ‘are”.
The crowd is becoming restless.
Similarly, there is only one ‘team’, ‘series’ and ‘range’.
Therefore, their respective sentences should read:
The team is playing well.
The series is about living within one’s means.
A range of antiques is to be auctioned.