1) Highly Doubtful.

2) Attempt to make it to the stick touches as little of your saliva as possible. They'll probably have to retake the test, but that won't be for a week or more so you'll have time to additionally flush your system.

3) Yes, also you can claim that you take readily available supplements ((purchase some from any health-supplement store and carry them in your purse so you can show them to the interviewer)) called "Hemp Oil". They cause positive testing for THC. If you use both in conjunction, you're double-likely to get away with it.

4) Cranberry Juice, Water, and B-Vitamins to keep color in your pee.

5) Almost as accurate as the tests they use, if they use the same method of testing.

Hope I helped.