Perform a hypothesis test to determine if the mean bill at the Idaho Falls office is less than the mean bill at the Rexburg office, which means we have the null hypothesis LaTeX: H_0: \mu_1 = \mu_2H 0 : μ 1 = μ 2 and alternative hypothesis LaTeX: H_a: \mu_1 < \mu_2H a : μ 1 < μ 2. Use the level of significance LaTeX: \alpha = 0.10α = 0.10. What is the degrees of freedom? (Round to three decimal places.)