Chlorine concentration in a municipal water supply is a uniformly distributed random

Chlorine concentration in a municipal water supply is a uniformly distributed random variable that ranges between 0.67 ppm and 0.97 ppm.

(a)        What is the mean chlorine concentration? (Round your answer to 2 decimal places.)

  Mean chlorine concentration ppm  =

(b)        Calculate the standard deviation? (Round your answer to 4 decimal places.)

  Standard deviation   ppm 

(c)        What is the probability that the chlorine concentration will exceed 0.92 ppm on a given day? (Round your answer to 4 decimal places.)

  Probability    

(d)       What is the probability that the chlorine concentration will be under 0.74 ppm? (Round your answer to 4 decimal places.)

  Probability    

(e)        What is the probability that the chlorine concentration will be between 0.82 ppm and 0.88 ppm? (Round your answer to 4 decimal places.)