help please in Statics and probabilty Q/The time between calls to a corporate office is exponentially distributed with a  mean of 10 minutes. (a) What is the probability that there are more than three calls in one-half hour? (b) What is the probability that there are no calls within one-half hour? (c) Determine x such that the probability that there are no calls within x hours is  0.01. (d) What is the probability that there are no calls within a two-hour interval?

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