Use the following classes, SimpleArray $($synchronized version$),$ ArrayWriter, and

SharedArrayTest for this program. Rename the SharedArrayTest class as

Program$7.$ Change the array size to $15,000,000.$ Modify the run method to enter only

the integers $1$ to $10$ for the elements of the array. The contents of the array should look

like this: $1,2,3,4...10,1,2,3,4..\mathrm{.}10$ and so on$.$ Add a totalArray attribute to the

SimpleArray class to return the sum of the elements in the array. Remove all the

Thread.sleep statements in the methods of the classes mentioned above. Also, remove

all the print statements in the SimpleArray class.

$$ Write a non$-$static method in the Program$7$ class named multiThreadedArray

that uses a Fix Thread Pool the size of the number of CPU cores in the system

and the classes named above to populate the array and find and display the

sum of its elements. Do not display the elements of the array. Make sure your

multithreaded code is thread safe and does not populate the array past the end.

Display the CPU cores of the system after the developer$$s information.

$$ Write a non$-$static method in the Program$7$ class named singleThreadedArray

that creates a simple integer array of size $15,000,000,$ populates the array with

the same integers as described for the multi$-$threaded version, and returns the

sum of the elements. Do not display the elements of the array.

$$ Write a non$-$static method in the Program$7$ class named compareTimes. Use

the Date$/$Time API timing techniques described in Section $23\mathrm{.}12$ to compare the

time required for both modules $($the Multi$-$Threaded and the Single$-$Threaded$)$ to

run