I really would appreciate it if someone could provide me with the Excel formulas to calculate the last five (5) columns of the spreadsheet listed below.

# of Trading Days Before/After Event Date	DATE	Closing Prices Procter&Gamble	MKT-Rf	Rf	Returns Honeywell	Expected Returns Procter&Gamble (ER)	Abnormal Returns Procter&Gamble (AR)	AR t-test	AR Significant (Y/N) ?	Cumulative Abnormal Returns Procter&Gamble (CAR)
-270	1/2/2004	49.4950	-0.17	0.003
-269	1/5/2004	49.7400	1.2	0.003	0.4950056
-268	1/6/2004	49.4900	0.2	0.003	-0.5026136
-267	1/7/2004	49.0500	0.34	0.003	-0.8890745
-266	1/8/2004	49.5650	0.45	0.003	1.0499491
-265	1/9/2004	49.8200	-0.72	0.003	0.514478
-264	1/12/2004	50.1250	0.57	0.003	0.6122039
-263	1/13/2004	49.8500	-0.51	0.003	-0.5486324
-262	1/14/2004	50.0150	0.8	0.003	0.330995
-261	1/15/2004	49.7550	0.15	0.003	-0.5198401