Calculate the critical z-value(s) for each of the given hypothesis test scenarios below. If multiple critical values exist for a single scenario, enter the solutions using a comma-separated list....

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Extracted text: Calculate the critical z-value(s) for each of the given hypothesis test scenarios below. If multiple critical values exist for a single scenario, enter the solutions using a comma-separated list. Round z-values to two decimal places. • Find the critical z-value(s) for a left-tailed test of hypothesis for a mean, assuming the population standard deviation is known, with a sample size of 40 and a significance level of 2.5%. • Find the critical z-value(s) for a right-tailed test of hypothesis for a proportion, with a sample size of 135 and let a = 0.05. Find the critical z-value(s) for a two-tailed test of hypothesis for a proportion, with a sample size of 77 and let a = 0.05. • Find the critical z-value(s) for a two-tailed test of hypothesis for a proportion, with a sample size of 85 and a significance level of 20%.