Question: The gross weekly sales at a certain restaurant is a normal random variable with mean $2200 and standard deviation $230. What is the probability that

The gross weekly sales at a certain restaurant is a normal random variable with mean $2200 and standard deviation $230. What is the probability that
(a) The total gross sales over the next 2 weeks exceeds $5000;
(b) Weekly sales exceed $2000 in at least 2 of the next 3 weeks?
What independence assumptions have you made?

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