I need assistance with these X4 Questions please,

1.) a and b?

Time to review: The following table presents the time taken to review articles that were submitted for publication to a particular 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 00.9 40 1.0 1.9 17 2.02.9 19 3.03.9 20 4.04.9 12 5.05.9 13 (my. (3) Approximate the variance of the times. Round the answer to at least two decimal places. The variance is D. (b) Approximate the standard deviation of the times. Round the answer to at least two decimal places. The standard deviation is D. Pay your bills: In a large sample of customer accounts, a utility company determined that the average number of days between when a bill was sent out and when the payment was made is 29 with a standard deviation of 3 days. Assume the data to be approximately bellshaped. (3) Between what two values will approximately 68% of the numbers of days be? Approximately 68% of the customer accounts have payment made between E] and E] days. Pay your bills: In a large sample of customer accounts, a utility company determined that the average number of days between when a bill was sent out and when the payment was made is 25 with a standard deviation of '3' days. Assume the data to be approximately bellshaped. (a) Estimate the percentage of bills for which payment was made in greater than 39 days. Approximately E] % of the bills have payments made in greater than 39. Caffeine: Following are the number of grams of carbohydrates in 12-ounce espresso beverages offered at a coffee shop. 29 34 48 43 39 43 9 11 37 25 10 22 33 30 49 15 5 27 22 45 50 28 30 69 Send data to Excel Part: 0 / 3 Part 1 of 3 Find the first quartile of these data. The first quartile of these data is