The annual earnings (in dollars) of 35 randomly selected microbiologists are shown in the data table. Use the data to (a) find the sample mean, (b) find the sample standard deviation, and (c) construct a 98% confidence interval for the population mean.

100,623	80,591	78,498	67,629	51,386	67,248	93,653	65,651
78,677	73,677	44,874	87,133	61,139	57,545	55,034	78,727
47,817	99,185	81,450	92,034	63,443	74,035	50,696	60,625
91,608	84,125	79,734	64,222	73,692	56,594	47,031	89,905
75,385	61,465	83,093