Court Time Allocation

There are four quarters in an NBA game, with 12 minutes each quarter. At any time on the basketball court, the two teams are playing 5 on 5. One day, Toronto Raptors is playing against Golden State Warriors. Among the five players in the Raptors starting lineup, two are all-star players. The Raptors coach also adds four bench players into the rotation. If each all-star player plays 3 times as long as a bench player, and if a bench player plays half as long as each of the other three starting player, how many minutes does an all-star player have to play in this game?