Points: 0.2 of 1 Dave The pulse rates of 152 randomly selected adult males vary from a low of 45 bpm to a high of 125 bpm. Find the minimum sample size required to estimate the mean pulse rate of adult males. Assume that we want 90% confidence that the sample mean is within 4 bom of the population mean. Complete parts (a) through (c) below. a. Find the sample size using the range rule of thumb to estimate o. n = 68 (Round up to the nearest whole number as needed.) b. Assume that o = 11.5 bpm, based on the value s = 11.5 bpm from the sample of 152 male pulse rates. n = (Round up to the nearest whole number as needed.)