please answer with excel fomulas

ex. =norm.s.dist(B12,b9)

og the summarized data below, determine the following

wired: umine that the population standard deviation is 2.1 inches, test at S percent level of significance if management has anything to worry about. the summarized data below. determine the following: e Mean ume the population standard deviation equal to: e Size there Chon ectornotre null DO not