A search on Best Barryo Mobile's website for "smartwatch" produced ninety-two results, 40 of which are actual smartwatches. Their prices are summarized in the frequency table below: Price ($) Number of Watches 50 to under 100 3 100 to under 150 6 150 to under 200 8 200 to under 250 5 250 to under 300 12 300 to under 350 6a. Calculate an approximate value for the sample variance. 0.00 Round to two decimal places if necessary b. Calculate an approximate value for the sample standard deviation. S 0.00 Round to two decimal places if necessary