The following is the sample of heights of men from a locality in inches:
67 70 72 71 72.5 74.4 74 69 66 67 62 67 69 71.4 70.5
74 60 65 74.5 72 75 65 77 63 73 73.5 70 71 72.4 72 69.5
Using central limit theorem, obtain the (a) 90% and (b) 99% confidence intervals for the mean height of men in the locality.