Modify and run the program shown below in the following way. There is an array of 20 elements defined in the program. The elements of the array are: [20 18 16 14 12 10 8 6 4 2-10-20-30-40 15 23 25 75 45 33]. Thread 1 adds the first five elements (i e., 20, 18, 16, 14, 12), Thread 2 adds the next five elements (i.e., 10, 8, 6, 4, 2), ...., Thread 4 adds the last five elements (23, 25, 75, 45, 33). Finally, the sum of all the 20 elements is printed by the program. include #include #include #define NUM_THREADS 3 int counter = 1; void *PrintHello(void *threadid) {counter = 2 *counter+ (int) threaded; printf(" Thread Id: %d Counter: %d &", threadid, counter); pthread_exit (NULL);} int main int argc, char *argv[]) {pthread_t threads[NUM_THREADS]; int rc, t; for (t = 0; t