Can you explain how to get the correct answer.

Time to review: The following table presents the time taken to review articles that were submitted for publication to a particula journal during a recent year. A few articles took longer than 6 months to review; these are omitted from the table. Consider the data to be a population. Time (Months) Number of Articles 0-0.9 48 1.0 - 1.9 19 2.0-2.9 18 3.0-3.9 17 4.0 -4.9 15 5.0-5.9 11 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