Question: The manager of the apartment complex rent apartments at a rent of $500/month believes that the number of units rented during any given month has a triangular distribution with minimum 30, most likely 34, and maximum 40. Operating costs follow a normal distribution with mean $15,000 and a standard deviation of $300. Use Crystal Ball to estimate the 80%, 90%, and 95% confidence intervals for the profitability of this business.

1. What is the probability that monthly profit will be positive?
2. What is the probability that monthly profit will exceed $4,000?
3. Compare the 80%, 90%, and 95% certainty ranges.
4. What is the probability that profit will be between $1,000 and $3,000?

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