A farmer in Napa Valley of California grows two's fruits on her farm: grapes and plums. Please answer the following questions in 10 minutes

acBook Air (1) She has figured that the weight of a grape harvest in a given season is normally distributed, with mean at 450 pounds and the standard deviation at 75 pounds. What is the probability that the grapes she collects during a harvest are more than 375 pounds, but less than 675 pounds? b) Suppose the farmer does not know the mean u and the standard deviation o of the weight of a grape harvest. But she observes that, for the weight as a normal random variable X: P(X 320) = 2.5% What are the respective values of u and o? ul= 0= c) During last harvest season, the farmer has collected data on daily harvest of plums for 64 days. During this period, the average weight of plums harvested was 90 pounds, and the sample standard deviation was 40 pounds. She sells plums on the wholesale market for $0.75/pound. What is the probability that, during last harvest, the average income made by selling a daily plum harvest is more than $60