Determine whether it is appropriate to use the normal distribution to estimate the p-value. If it is appropriate, use the normal distribution and the given sample results to complete the test of the given hypotheses. Assume the results come from a random sample and use a 5% significance level.

Test H₀: p = 0.5 vs H_a: p > 0.5 using the sample results p̂ = 0.57 with n = 40