A statistics student plans to use a TI-84 plus calculator on her final exam, from past experience she estimates that there is a 0.92 probability that the calculator will work everyday. Because the final exam is so important she plans to use redundancy by bringing in 2 TI-84 calculators. What is the probability that she will be able to complete her exam with a working calculator? Does she really gain anything by bringing in 2? Explain.