Based on recent security attacks on payroll DB, CISO decided to have a thorough investigation of the attack taking support from the certified external security agency. The agency requested to have access to read the following 2 details. Details of access permissions to the building Tables information of Payroll DB. What is the (Security level, [Category levels]) with the lowest possible security level and with the minimum number of need-to-know categories that can be assigned to the investigators? Explain the reason for your selection.