these are omitted from the table data to be a population: Time (Months) Number of Articles 0-0.9 42 1.0 - 1.9 19 2.0 -2.9 16 3.0-3.9 20 4.0 -4.9 11 5.0 -5.9 15 Send data to Excel (a) Approximate the variance of the times. Round the answer to at least two decimal places. The variance is (b) Approximate the standard deviation of the times. Round the answer to at least two decimal places. The standard deviation is