The discretion to determine the appropriate sentence is vested in the judiciary. See, State v. Lee, 237 Neb. 724, 467 N.W.2d 661 (1991); State v. Evans, 194 Neb. 559, 234 N.W.2d 199 (1975). In the exercise of that discretion, it is proper for a trial court to grant sentence concessions to defendants who plead guilty when the interest of the public in the effective administration of criminal justice would be served.