$3.$ Ring Problem

Write a C program that implements a ring algorithm using MPI. The

program calculates the sum of all the process$$s ranks.

The program steps are as follows:

$1.$ All processes initialize MPI.

$2.$ Each process gets its rank and the total number of processes.

$3.$ Each process calculates its left and right neighbours. $($For example, for

processor $3$ its left is equal to $2$ and its right is equal to $4).$

$4.$ Each process initially sends its rank to its right neighbour and receives the

rank of its left neighbour and initialize the sum variable to its rank.

$5.$ Then, repeatedly do the following:

a$.$ Each process adds the received value from its left neighbour to its

sum variable.

b$.$ Send the received value from the left neighbour to its right

neighbour.

c$.$ Receive a value from its left neighbour.

$6.$ Steps in point $5$ are repeated until each process receives its own rank.

$7.$ Each process prints its rank and sum to the console.

$8.$ All processes finalize MPI.

Copy the source code in your answers file. Launch the Command line and

take a Screenshot of the window with the result of the program execution

including your name. $($copy the Screenshot in your answers file$).$ Also, provide

an explanation showing how the code works.