Please calculate a z-test for the difference between proportions to see if there is a difference between how liberal California and Alabama are.A sample of 50 Alabamans was selected.Eight of them identified as liberal.A sample of 40 Californians was selected.Twelve of them of them identified as liberal.Calculate the z-statistic.State the critical value, and come to a conclusion about the difference between Alabamans and Californians.Let = .05.Make it two-tailed.You need to explain all of the steps you take in your calculations.You don't have to show the formulas, but you need to explain how you calculate everything that you have to calculate.