What is the test for a police officer's reasonable suspicion of criminal activity?

Officers may properly "draw on their own experience and specialized training to make inferences from and deductions about the cumulative information available to them that might well elude an untrained person. " ( United States v. Arvizu (2002) 534 U.S. 266, 273, 122 S.Ct. 744, 151 L.Ed.2d 740 ( Arvizu ).) However, the officer's suspicion must be objectively reasonable. "[T]he facts must be such as would cause any reasonable police officer in a like position, drawing when appropriate on [their] training and experience ... to suspect the same criminal activity and

[258 Cal.Rptr.3d 255]