plz help me i will upvote if its correct.

Each year, Hudson's Bay Company sets up a gift-wrapping station to assist its customers with holiday shopping. Preliminatry observations of one worker at the station produced the following sample time ( in minutes per package): 3.9 3.4 3.5 3.2 3.9 Based on this small sample, what number of observations would be necessary to determine the true cycle time with a \95 confidence level and an accurace of \5 ? Round to 2 decimal places (except \\( n= \\) whole numbers) Round to 2 decimal places (if the ans. Is 0.276432 put 0.28 ) \\[ x \\text { bar }= \\] St Dev \\( = \\) \\[ \\mathrm{n}= \\]