I need help solving Problem 50 and Problem 5.62. I want to know how to solve them. I included the "Normal Curve Area" table.

Problem 50 Easy Difficulty Jump To Question A group of Florida State University psychologists examined the effects of alcohol on the reactions of people to a threat (Journal of Abnormal Psychology, Vol. 107,1998 ). After obtaining a specified blood alcohol level, the psychologists placed experimental subjects in a room and threatened them with electric shocks. Using sophisticated equipment to monitor the subjects' eye movements, the psychologists recorded the startle response (measured in milliseconds) of each subject. The mean and standard deviation of the startle responses were 37.9 and 12.4 , respectively. Assume that the startle response x for a person with the specified blood alcohol level is approximately normally distributed. a. Find the probability that x is between 40 and 50 milliseconds. b. Find the probability that x is less than 30 milliseconds. c. Give an interval for x centered around 37.9 milliseconds so that the probability that x falls in the interval is .95 d. Ten percent of the experimental subjects have startle responses above what value?5.62 Examine the following sample data. 5.9 4.0 6.0 4.6 5.3 1.6 7.4 8.6 7.3 8.4 5.9 6.7 9.7 3.5 3.1 4.3 8.2 6.5 1.1 5.0 3.2 2.1 4.5 6.3 3.3 8.4 9.4 6.4 3. Construct a stem-and-leaf plot to assess Whether the data are from an approximately normal distribution. b. Compute s for the sample data. c. Find the values of Q L and QU and the value of .3 from part b. to assess Whether the data come from an approximately normal distribution. (1. Generate a normal probability plot for the data, and use it to assess whether the data are approximately normal. Note: For problem 5.62, you can use R to draw stem-and- leaf plot, normal q-q plot, and histogram. The R functions are: stem( ), ggnorm( ), qqline( ), hist( )