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On average, a student takes 28 minutes to complete an essay, with a variance of four minutes. Assume the amount of time a student takes

On average, a student takes 28 minutes to complete an essay, with a variance of four minutes. Assume the amount of time a student takes to write an essay follows a normal distribution. Answer the following questions. Round up all your answers to two decimal points.

1. What is the probability that a student takes exactly 28 minutes to complete an essay?

2. What is the probability that a student takes less than 26.5 minutes to complete an essay?

3. What is the probability that a student takes less than, or equal to 26.5 minutes to complete an essay?

4. Assume you wait 30 minutes for a student to finish writing her essay. What is the probability that she still has not finished writing her essay?

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