I have 3 Questions,

1.)

Lunch break: In a recent survey of 621 working Americans ages 2534, the average weekly amount spent on lunch as $44.70 with standard deviation $2.96. The weekly amounts are approximately bellshaped. (a) Estimate the percentage of amounts that were less than $41.74. Round the answer to one decimal place. Approximately [:1 % of the amounts were less than $41.74. What's the temperature? The temperature in a certain location was recorded each day for two months. The mean temperature was 74.6F with a standard deviation 24F. What can you determine about these data by using Chebyshev's Inequality with K=2? At least [1% of the days had temperatures between I] 13F and D \"F For the data set 1 2 3 4 7 7 9 9 12 12 12 14 14 15 15 16 18 18 19 19 24 24 24 25 25 25 25 28 28 28 31 33 34 35 35 36 37 39 42 45 45 47 47 47 48 50 51 52 52 53 54 54 56 56 57 58 60 60 64 64 65 67 68 70 71 Send data to Excel Part 1 of 4 (a) Find the 75" percentile. The 75 percentile is Part 2 of 4 (b) Find the 42" percentile. The 42" percentile is Part 3 of 4 (c) Find the 18 percentile. The 18th percentile is