Hi, Could you please show me how to answer both questions below using Excel? Thank you!

The S&P Stock 500 Exchange index had the values in the attached file in January 2012.

Date	S&P 500 Index
4-Jan-12	1,277.30
5-Jan-12	1,281.06
6-Jan-12	1,277.81
9-Jan-12	1,280.70
10-Jan-12	1,292.08
11-Jan-12	1,292.48
12-Jan-12	1,295.50
13-Jan-12	1,289.09
17-Jan-12	1,293.67
18-Jan-12	1,308.04
19-Jan-12	1,314.50
20-Jan-12	1,315.38
23-Jan-12	1,316.00
24-Jan-12	1,314.65
25-Jan-12	1,326.06
26-Jan-12	1,318.43

Question 1: The predicted value for the S&P index for the next business day after January 26th is _______ . (Hint: Please keep two decimal points.)

Question 2: The 95% Prediction Interval is from _______ to ________ . (Hint: Please keep three decimal points.)