Would anyone be able to answer question 22 from Chapter 11 Fundamentals of Corporate Finance (8th Edition). Here is the excel data provided. Thanks!

You will find this spreadshet containing 5 years of monthly rates of return on ExxonMobil (XOM), BP, and Walmart (WMT).

(a) What was the average return and standard deviation of returns for each firm?

(b) What was the coorelation of returns between each pair of firms? Try using excel's CORREL function, which calacuates the coorelation between two series of numbers. Which pair of firms exhibits the highest coorelation of returns? Is this surprising?

(c) Now imagine taht you held an equally weighted portfolios of ExxonMobil and Walmart (that is a portfolio with equal dollar investments in each stock). Compute the portfolio's monthly rate of return for each month and calculate the standard deviation of the portfolio's monthly rate of return. Is the portfolio standard deviation more or less than the average of the standard deviations of the two component stocks?

(d) Repeat part (c) but this time calculate the results of a portfolio of BP and ExxonMobil

(e) Comparing your answers to (c) and (d) which pair of firms provides the greater benefits from diversification? Relate your answer to the coorelation coefficients you found in part(a)

DATE	XOM	BP	WMT
4/1/13	88.38	39.99	77.26
3/1/13	89.49	40.31	74.38
2/1/13	88.93	38.46	69.91
1/2/13	88.78	41.85	69.09
12/3/12	85.41	39.14	67.39
11/1/12	86.98	39.26	70.74
10/1/12	89.41	39.81	73.69
9/4/12	89.68	39.32	72.49
8/1/12	85.61	39.04	71.31
7/2/12	84.62	36.62	72.71
6/1/12	83.38	37.21	68.11
5/1/12	76.61	33.46	64.3
4/2/12	83.55	39.37	57.16
3/1/12	83.93	40.81	59.39
2/1/12	83.7	42.77	56.95
1/3/12	80.59	41.2	59.14
12/1/11	81.57	38.36	57.6
11/1/11	77.42	39.09	56.42
10/3/11	74.71	39.26	54.33
9/1/11	69.49	32.05	49.72
8/1/11	70.82	35	50.95
7/1/11	75.84	39.99	50.13
6/1/11	77.35	38.98	50.54
5/2/11	79.33	40.7	52.52
4/1/11	83.15	40.23	51.94
3/1/11	79.51	38.49	49.18
2/1/11	80.83	42.26	48.77
1/3/11	75.85	41.02	52.61
12/1/10	68.74	38.17	50.6
11/1/10	65.4	34.56	50.47
10/1/10	62.12	35.25	50.54
9/1/10	57.73	35.57	49.94
8/2/10	55.22	30.1	46.78
7/1/10	55.36	33.24	47.49
6/1/10	52.94	24.95	44.59
5/3/10	56.08	37.11	46.9
4/1/10	62.44	44.32	49.47
3/1/10	61.71	48.5	51.28
2/1/10	59.89	45.22	49.59
1/4/10	58.98	46.98	49
12/1/09	62.42	48.53	49.02
11/2/09	68.72	47.87	49.78
10/1/09	65.23	46.73	45.33
9/1/09	62.44	43.94	44.79
8/3/09	62.93	42.47	46.42
7/1/09	63.67	40.62	45.27
6/1/09	63.24	38.7	43.96
5/1/09	62.73	40.18	45.14
4/1/09	59.95	33.86	45.49
3/2/09	61.23	31.98	47.03
2/2/09	61.06	30.59	44.2
1/2/09	68.43	33.19	42.29
12/1/08	71.42	36.53	50.32
11/3/08	71.71	38.06	49.94
10/1/08	65.93	38.15	49.88
9/2/08	69.08	38.51	53.53
8/1/08	71.17	44.24	52.79
7/1/08	71.18	46.51	52.18
6/2/08	78	52.67	50.03
5/1/08	78.56	54.89	51.4
4/1/08	82	54.49	51.39
3/31/08	74.52	45.4	46.7