Given the following files (see Extra Files):

IncreaseFactorial.java

FactorialCounter.java

TestFactorial.java

Complete the parallelized version of the factorial method (n!).

The multipleIncrement method of the FactorialCounter class needs to be completed such that it uses the increment method.

The result needs to be computed before it is returned from the factorialParallel method of TestFactorial class.

Answer the following questions:

1) Remove the comments within the run method of the IncreaseFactorial class and observe the different threads executing with their various hold values. Do all four threads get to work all of the time?

2) Update the code to use only two threads. Does it run faster? Why, or why not?

3) Why does the parallelized method run slower than the serial version?