(a) Predict the mean value of y if x = 7.
(b) Construct a 95% confidence interval for the mean value of y if x = 7.
(c) Predict the value of y if x = 7.
(d) Construct a 95% prediction interval for the value of y if x = 7.
(e) Explain the difference between the prediction in parts (a) and (c).