3.  A 95% confidence interval estimate for a population mean was computed to be (44.8 to 50.2). Determine the mean of the sample, which was used to determine the interval estimate. 4.  In testing the hypothesis, H0:   28.7 and Ha:  Part II. Short Answers & Computational Questions SHOW ALL WORK3. A 95% confidence interval estimate for a population mean wascomputed to be (44.8 to 50.2). Determine the mean of the sample, whichwas used to determine the interval estimate.4. In testing the hypothesis, H0: ( ( 28.7 and Ha: ( p-value approach, a p-value of 0.0764 was obtained. If ( = 9.8, find thesample mean which produced this p-value given that the sample of size n= 40 was randomly selected.