I need help with A and B. Please show how ypu get what you're getting. last two people have gotten it wrong and im really confused!

Motorola used the normal distribution to determine the probability of defects and the number of defects expected in a production process. Assume production process produces items with o mean weight of 8 ounces. a. The process standard deviation is 0.10 ounces, and the process control is set at plus or minus 2.5 standard deviations. Units with weights less than 7.75 or greater than 8.25 ounces will be classined as defects. What is the probability of a defect (to 4 decimals)? In a production run of 1000 parts, how many defects would be found (round to the nearest whole number)? b. Through process design improvements, the process standard deviation con be reduced to 0.09 ounces. Assume the process control remains the same, with weights less than 7.75 or greater than 8.25 ounces being classified as defects. What is the probabinity of a defect (round to 4 decimols; if necessary) In a production run of 1000 parts, how many defects would be found (to the nearest whole number)