Imagine a ballroom with two kinds of dancers: leaders and followers. Dancers of both kinds wait in two separate queues before entering the dance floor. When a leader arrives, it checks to see if there is a follower waiting. If so, they can both proceed. Otherwise it waits. Similarly, when a follower arrives, it checks for a leader and either proceeds or waits, accordingly. Make sure that the next pair of leader/follower may dance only after the previous pair is done. Write the pseudocode for leaders and followers that enforces these constraints