In$-$Class Assignment: Formal $/$ informal writing style

First name, last name of group$/$team members:

Identify which of the following statements is formal, which informal writing $/$ why:

"Hey, can you get back to me on this when you get a chance?"

"Per our discussion, the attached document outlines the proposed budget adjustments for the next fiscal year."

"What's up$?$ Just checking in to see how the project's going."

$"$As previously stated, the deadline for report submissions is the end of this month."

"Lol, yeah, that meeting was a waste of time. Anyway, what's next?"

"Thank you for your email. I will review the attached files and respond by tomorrow."

"OMG, can't believe how complicated this process is$.2"$

"This is to inform you that the next team meeting has been scheduled for Thursday at $10$ AM$."$

"Yourn't catch that, can u repeat?"

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