From the generated set of logistic regression models, select one that you believe is a good fit. express the model as a mathematical equation relating the output variable to the input variables. b. increases in which variables increase the chance of a voter being undecided? increases in which variables decrease the chance of a voter being decided? c. using the default cutoff value of 0.5 for your logistic regression model, what is the overall error rate on the test data? d. examine the decile-wise lift chart for your model on the test data. what is the first decile lift? interpret this value.