Juvenile-defendants' convictions as adults for carjacking, assault with a firearm, and multiple counts of second-degree robbery, including criminal street gang and firearm enhancements on each count, and sentences are affirmed in part, reversed in part and remanded where: 1) substantial evidence supports the jury's true findings on the gang allegations; 2) sufficient evidence supported personal use of a firearm; 3) trial court did not err in imposing criminal conviction assessments, but must be corrected to state the correct amount; and 4) defendant's sentence of 84 years to life is remanded as the sentence is the equivalent of life without possibility of parole and is cruel and unusual punishment.