(1 point) The score on an exam from a certain MA 336 class, X, is normally distributed with u = 73.3 and o = 8.6. NOTE: Assume for the sake of this problem that the score is a continuous variable. A score can thus take on any value on the continuum. (In real life, scores are often treated as if they were continuous values but are actually discrete in most cases.) (a) Write the event "a score equal to 59.3" in terms of X: (b) Find the probability of this event: (c) Find the probability that a randomly chosen score is greater than 80.3: (d) Find the probability that a randomly chosen score is between 59.3 and 80.3:(1 point) Starting salaries of 125 college graduates who have taken a statistics course have a mean of $43,278. Suppose the distribution of this population is approximately normal and has a standard deviation of $9,524. Using a 98% confidence level, find both of the following: (NOTE: Do not use commas nor dollar signs in your answers.) (a) The margin of error. (b) The confidence interval for the mean #: