A survey reports that the spending on cosmetic products ordered online follows a normal distribution with mean $1200 and standard deviation $200. (a) There are 75% of the online orders of cosmetic products with spending between $(1200 – M) and $(1200 + M). What is the value of M?  (b) There are 8 online orders received this morning. What is the probability that exactly 6 of the orders with spending more than $1200?

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