can some help me with all those problems? please solve them in the correct way. You can use the chart (6-5) for question 6-3 (b).

Problem 6-2 (Algo) Rachel loves to bake cookies, but she has an old oven that has trouble maintaining a constant temperature. If the acceptable temperature range for making the cookies is 350 plus or minus 21 degrees, what is the allowable standard deviation in the temperature of her oven in order to achieve a Six Sigma level of quality? (Round your answer to 3 decimal places.) Standard deviation degrees Problem 6-3 (Algo) Rachel loves to bake cookies, but she has an old oven that has trouble maintaining a constant temperature. Assume the acceptable temperature range for making the cookies is 350 plus or minus 2 degrees. Six Sigma quality (3.4 defects per million units produced) is probably a bit much to ask of Rachel's old oven. a. What would the standard deviation in the temperature of her oven need to be if she settled for a "Three Sigma" level of quality? (Round your answer to 2 decimal places.) Standard deviation degrees b. If her oven exactly meets this quality level, what percentage of the time would her oven be operating at a temperature outside the acceptable range? Use Table 6-5. (Round your answer to 2 decimal places.) Percentage of the time Suppose that the Dallas School District wants to achieve Six Sigma quality levels of performance in delivering students to school. They have established a 35-minute window as an acceptable range within which buses carrying students should arrive at school. a. What is the maximum allowable standard deviation of arrival times required in order to achieve this standard of quality? (Round your answer to 2 decimal places.) Standard deviation minutes b. If they achieve this standard, about how many times out of a million deliveries will a bus deliver students either too early or too late? (Round your answer to 1 decimal place.) Number of times times TABLE 6-5 How Quality Relates to Sigma Sigma Level Defects per Million Units 20 308,770 30 66,810 40 6,209 50 233 6 o 3.4 The Classical View of Quality 99.9% Good (4.60) The Six Sigma View of Quality "99.99966% Good (60) 20,000 lost articles of mail per hour. Seven lost articles of mail per hour. Unsafe drinking water almost 15 minutes each day. One minute of unsafe drinking water every seven months. 5,000 incorrect surgical operations per week. 1.7 incorrect surgical operations per week. 2 short or long landings at most major airports daily. One short or long landing at most major airports every five years. 200,000 wrong drug prescriptions each year. 68 wrong drug prescriptions each year. No electricity for almost 7 hours each month. . One hour without electricity every 34 years