Ross Co., Westerfield, Inc., and Jordan Company announced a new agreement to market their respective products in China on July 18 (7/18), February 12 (2/12), and October 7 (10/7), respectively. Given the information below, calculate the cumulative abnormal return (CAR) for these stocks as a group. Assume all companies have an expected return equal to the market return. (Negative values should be indicated by a minus sign. Leave no cells blank - be certain to enter "0" wherever required. Do not round intermediate calculations. Round your answers to 1 decimal place.)

Ross Co.				Westerfield, Inc.				Jordan Company
Date	Market Return	Company Return		Date	Market Return	Company Return		Date	Market Return	Company Return
7/12	-0.5	-0.4		2/8	-0.5	-0.4		10/1	0.9	1
7/13	0.7	0.3		2/9	-0.2	-0.4		10/2	0.8	1
7/16	0	0.2		2/10	0	0.6		10/3	0.3	1.3
7/17	-0.6	-0.2		2/11	0.2	1.6		10/6	-0.1	-0.3
7/18	-1.3	1.3		2/12	-0.1	0.1		10/7	-1.8	-0.3
7/19	-1.4	-0.6		2/15	0.7	1.4		10/8	0.1	0.5
7/20	-0.9	-0.7		2/16	0.7	0.1		10/9	-0.5	-1
7/23	0.6	0.4		2/17	-0.1	0		10/10	0.1	-0.1
7/24	0.7	0		2/18	1.1	0.4		10/13	-0.1	-0.6

	Abnormal returns (Ri RM)
Days from announcement	Ross	Wfield	Jordan	Sum	Average abnormal return	Cumulative average residual
-4
-3
-2
-1
0
1
2
3
4

Please show how you did the Average abnormal return and the Cumulative average residual! That is what i need help on mostly, I understand everything else!