1.Use the random walk model to forecast the closing price of this stock on the next trading day. Round your answer to the nearest cent, if necessary.

$____

2. You can be about 95% certain that the forecast made in part a will be off by no more than how many dollars? Round your answers to the nearest cent, if necessary.

	Forecast
Lower limit	$
Upper limit	$

Date	Adjusted Close
4-Jan-18	100.47
5-Jan-18	100.70
8-Jan-18	99.78
9-Jan-18	100.14
10-Jan-18	100.84
11-Jan-18	100.35
12-Jan-18	100.59
16-Jan-18	99.97
17-Jan-18	100.38
18-Jan-18	99.49
19-Jan-18	97.66
22-Jan-18	97.95
23-Jan-18	97.61
24-Jan-18	98.93
25-Jan-18	99.32
26-Jan-18	99.26
29-Jan-18	99.04
30-Jan-18	98.34
31-Jan-18	99.03
1-Feb-18	99.63
2-Feb-18	96.32
5-Feb-18	91.67
6-Feb-18	93.83
7-Feb-18	93.26
8-Feb-18	88.01
9-Feb-18	91.38
12-Feb-18	94.35
13-Feb-18	94.21
14-Feb-18	95.87
15-Feb-18	96.20
16-Feb-18	96.43
20-Feb-18	96.83
21-Feb-18	97.14
22-Feb-18	96.99
23-Feb-18	98.43
26-Feb-18	101.26
27-Feb-18	99.21
28-Feb-18	97.15
1-Mar-18	94.78
2-Mar-18	95.24