U Tin is planning a dinner party in his garden lawn. He invited 22 guests. In order to seat them he needs to set card tables, the size that seats one person on each side. He wants to arrange the tables in a big rectangle shape so that all 22 guests can sit in one large table. What is the smallest number of card tables that U Tin needs to arrange?

A. find the power of the test, when the null hypothesis assumes a population mean of mu = 450, with a population standard deviation of 156, the sample size is 5 and the true mean is 638.47 with confidence intervals of 95 b. find the power of the test, when the null hypothesis assumes a population mean of mu = 644, with a population standard deviation of 174, the sample size is 3 and the true mean is 744.04 with confidence intervals of 95% c. find the power of the test, when the null hypothesis assumes a population mean of mu = 510, with a population standard deviation of 126, the sample size is 10 and the true mean is 529.44 with confidence intervals of 95