Answer
The 95% prediction interval is between 4870.30 and 9113.01 dollars.
(for the price of a particular diamond with 0.85 carat, color E, clarity VVS1)
Work Step by Step
With the results from item (e) still available in MINITAB:
Select Stats -> Regression -> Regression -> Predict
Enter 0.85, 2 and 3 in the first row of the table.
Click in Options and enter the level of confidence. Click OK.
Click OK.
