Double Negative Incorrect Intensive Pronoun Slang

Because I studied, the test was no sweat.
Double Negative – Because I studied, the test was no sweat.
Incorrect Intensive Pronoun – Because I studied, the test was no sweat.
Slang – Because I studied, the test was no sweat.
She couldn't hardly fit the book in her purse.
Double Negative – She couldn't hardly fit the book in her purse.
Incorrect Intensive Pronoun – She couldn't hardly fit the book in her purse.
Slang – She couldn't hardly fit the book in her purse.
We didn't tell nobody about the broken window.
Double Negative – We didn't tell nobody about the broken window.
Incorrect Intensive Pronoun – We didn't tell nobody about the broken window.
Slang – We didn't tell nobody about the broken window.
The amusement park was way cool!
Double Negative – The amusement park was way cool!
Incorrect Intensive Pronoun – The amusement park was way cool!
Slang – The amusement park was way cool!
The manager himself took the mop and cleaned up the mess. whats the corect awnsers?

The correct answers are:

Double Negative - The manager himself took the mop and cleaned up the mess.
Incorrect Intensive Pronoun - The manager himself took the mop and cleaned up the mess.
Slang - The manager himself took the mop and cleaned up the mess.

The given sentence does not contain any errors related to double negative, incorrect intensive pronoun, or slang. So, the sentence is correct as it is:

The manager himself took the mop and cleaned up the mess.

The correct answers would be as follows:

Double Negative – The sentence does not contain a double negative.
Incorrect Intensive Pronoun – The sentence does not use an incorrect intensive pronoun.
Slang – The sentence does not use any slang.

Therefore, the sentence "The manager himself took the mop and cleaned up the mess." does not contain any grammatical errors or informal language.