A random variable is normally distributed with a mean of 20 and a standard deviation of 4. If an observation is randomly selected from the distribution, a. What value will be exceeded 25%% of the time? b. What value wil be exceeded 95% of the time? c. Determine two values of which the smaller has 15% of the values below it and the larger has 15% of the values above it d. What value will 5%% of the observations be below? a. The value will be exceeded 25% of the time. (Round to one decimal place as needed.) b. The value will be exceeded 95% of the time (Round to one decimal place as needed.) e. The value has 15% of the values below it and the value has 15% of the values above it. (Round to one decimal place as needed.) d. The value will have 5% of the observations below it. (Round to one decimal place as needed.)