. Question 10 1* A certain kind of sheet metal has an average of I" defects per 20 ft2. Assuming a Poisson distribution, we will want to find the probability that a 23 ft2 piece of sheet metal has at Least 8 defects. {a} First find the mean number of defects per 13 ft2 of this sheet metal. Give your answer as a fraction 3 defects with no units {for example, if you find the mean to be E 2 , then you would type "33'4" in the 23 ft answer box}. ' ' defects ' _ i_ i 2 23 ft [b] Then find the probability that a 23 ft2 piece of this sheet metal has at least 8 defects. Round this answer to 4 place: after the decimal point, if necessary. Pfat least 8 defects] =|