This problem has been solved! see the answerresearchers investigated the physiological changes that accompany laughter. ninety subjects (18-34 years old) watched film clips designed to evoke laughter. during the laughing period, the researchers measured the heart rate (beats perminute) of each subject, with the following summary results: overbarx=73.8 s=6. it is well known that the mean resting heart rate of adults is 71 beats per minute. complete parts a through d below. a. set up h0 and ha for testing whether the true mean heart rate during laughter exceeds 71 beats per minute. choose the correct answer below. a. h0: μ=71ha: μl< 71b. h0: μ≠71ha: μ=71c. h0: μ=71ha: μ> 71your answer is correct. d. h0: μ=71ha: μ≠71b. if α=0.05, find the rejection region for the test. choose the correct answer below. a .z< −1.96b. z> 1.96 or z< −1.96c. z> 1.645 or z< −1.645d. z> 1.645e. z> 1.96f. z< −1.645