Does she need some positive alone time with you? She may need more attention. Try to set aside time to do fun things with her and make sure not to reward the misbehavior with attention.
How? First, ignore the whining and little things. Explain that your ears can't hear that kind of talk, and even tell her straight out "what I want to hear is: Mom, can I please have a glass of lemonade?" So often we tell them "don't", but they are left wondering what we DO want them to do. So be clear.
Secondly, don't bother with threats, don't make deals, and certainly don't confuse her by acting on her level. Be as calm and matter-of-fact as possible. Tell her, "Please hang up your jacket now." If she does it, praise her "great job, you are such a helpful girl!" If she doesn't, tell her "I will help you" and go right over and take her by the hand and kindly but firmly "help" her hang up the jacket. If she is like my son, this will outrage her because he wants to do it himself (even if he has just refused to). But don't let her do it herself if she didn't right away. Help her, and then tell her that next time she can do it herself. Or, if she didn't care about doing it on her own, don't say anything. Just help her and then go on about your business. No extra attention for noncompliance (positive or negative).
Once she sees that she doesn't get attention for the noncompliance, she will do it less. Especially if you give her positive attention at other times. And she will learn to do it right away, because you don't give threats, you take immediate action.
Final note: sometimes kids need to test you and complain, etc.
They need to see that they can trust Mom to be a reasonable adult even when they are acting like the immature children that they are. So I caution against some of the advice I read.