a - Implement a Thread-pool concurrent program that uses a callable object to compute frequency of negative even number inside a large array of size 1,000,000 random integers ranging between -100 to 100. Your program should distribute workload between all threads and use optimal number of threads to provide best performance.

b - Explain why the thread listed below may never terminate, and re-write it so that it is guaranteed to do so.

class T1 extends Thread{ private boolean go = true; public void run()

{ while(go)

{ try{ this.sleep(1000); //1000 milliseconds == 1 sec }

catch(InterruptedException e){} } }

public void terminate(){ go = false; } }

c - Implement a class that starts a thread; the thread job is to print two different messages, 10 times to the console. Make sure the messages are not overlapped on screen.