The owner of a sportswear store recorded the monthly advertising expense thousands of dollars) and the sales (in millions of dollars) over the past 12 months. The data are listed in the table below: Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Advertising 23 46 60 54 28 33 25 31 36 88 90 99 Sales 9.6 11.3 12.8 9.8 8.9 12.512.0 11.4 12.6 13.7 14.4 15.9 For all the blanks below, please just input numerical answers, round the answers to 2 decimal places, and ignore the symbols of the dollar, percentage comma etc. Question (a) [1 mark] The conditional probability of the sales being greater tha 10 (million dollars) if the advertising expense is greater than 20 (thousand dollars) is % . Question (b) [1 mark] The conditional probability of the sales being greater than 10 (million dollars) if the advertising expense is greater than 30 (thousand dollars) is