help please!

The pulse rates of 161 randomly selected adult males vary from a low of 38 bom to a high of 102 bom. Find the minimum sample size required to estimate the mean pulse rate of adult males. Assure that we want 90%% confidence that the sample meen is within 2 bom of the population mean. Complete parts (a) through (c) below a. Find the sample size using the range rule of thumb to estimate a. n =] (Round up to the nearest whole number as needed.) b. Assume that o = 12 2 bpm, based on the value s = 12.2 bom from the sample of 161 male pulse rates. n= (Round up to the nearest whole number as needed.) c. Compare the results from parts (a) and (b). Which result is likely to be better? The result from part (a) is the result from part (b) The result from is likely to se teller becal.se it is larger. it uses a better estimate of a it is smaller