Part I: $[7$ points$|$

Write a multithreaded program in Java that calculates various statistical values for a list of

numbers. This program will be passed a series of numbers on the command line and will then

create three separate worker threads. One thread will determine the sum of the numbers, the

second will calculate the average of the numbers, and the third will determine the maximum value.

The parent thread should output the values once the workers have exited.

For example, suppose your program is passed these integers:

$./$java yourprogram $90817895797180$

The program should print:

Sum $=574$

Average $=82$

Max $=95$

Part II: $[8$ marks$]$

A$)[4$ marks$]$ Write a C program where multiple threads $($e$.$g$.,10$ threads$)$ each increment a

shared counter by one $100,000$ times. Compile and run your program several times $($at least $5$ runs

are recommended$).$ Provide screenshots of the output from multiple runs. Discuss briefly in your

report why the final counter value is not consistently $1,000,000$ as expected.

B$)[4$ marks$]$: Modify your program from Part II$-$A to incorporate a mutex lock for synchronizing

access to the shared counter. Ensure that each increment operation on the counter is protected by

the mutex. Capture screenshots showing that the issue identified in Part II$-$A is no longer

present. In your report, explain how the mutex lock solved the problem.

HINTS:

You will need to use the following pthread functions: pthread$\_$create $(...),$

pthread$\_$join$(...),$ pthread$\_$mutex$\_$init$(...),$ pthread$\_$mutex$\_$destroy$(...),$

pthread$\_$mutex$\_$lock$(...),$ pthread$\_$mutex$\_$unlock $(...).$

Remember to initialize the mutex before using it and destroy it once it is no longer needed.

Here is how you can declare and use a mutex:

pthread$\_$mutex$\_$t lock;

pthread$\_$mutex$\_$init$($&lock, NULL$)$;

pthread$\_$mutex$\_$destroy$($&lock$)$;

Use this skeleton code for Part II:

Instructions:

Submit one report in PDF format containing the source code for PART I, PART II$-$A and

PART II$-$B along with the required execution screenshots as well as the discussion for

PART II$-$A and PART II$-$B$.$

Submit the source code for PART I, PART II$-$A and PART II$-$B$.$

Ensure to include your name and student ID in the report.

Everything you submit MUST be your OWN work, the use of generative AI tools such as

ChatGPT is strictly prohibited and will result in receiving ZERO in this assignment.