I need all the answers to the questions (Q1-Q2-Q3).

Q1 - The students mark for English class are given as 60, 76, 71, 80, 65, 49,91,69,58. Compute the sample variance and standard deviation Q2- Find the median, first quartile, and third quartile of the following data of ages (in years) Q3- The following table shows the frequency distribution of the number of orders received each day during the past 61 days at the office of a mail-order company. Find the median