Answer:
We need to talk about the deadline; please call me is an appropriate text message because its message is clear and friendly
Step-by-step explanation:
COMPUTER CRASHED! NEED MORE TIME. : this is an inappropriate text message because is sends panic to the recipient and it is also not properly constructed in a friendly tone, it sounds more a less like a rude demand
There are big problems!!!!! can we meet???? soon!!! : this text is also very inappropriate because of the overuse of exclamation and question marks and it doesn't sound friendly and welcoming and it is also mandating the recipient.
wu? cm. netime b4 8 : this text is extremely poor even from the construction of the sentence because it contained a lot of figures and number and it doesn't convey any specific message