Write a C code to let the main thread create N child threads,where each created thread will randomly generate an integer between0 to 10 and put it into a global array variable. After that, themain thread will calculate the sum of all the generated integers. Nshould be input as a command line argument.

Complete the following C code by filling all “???”s in the codesketch. NOTE: when you compile the code, you need to add theparameter “-lpthread” to “gcc”, e.g., “gcc YourCode.c-lpthread”

// include the header file that allows us to use pthread#include #include // include the header file that allows us to use dynamic memory management #include // define a pointer to point to an array to hold the randomly generated integersint *a;// define the function used to create a thread???runner(???param);int main(int argc, char *argv[]){    if (argc != 2)    {        fprintf(stderr, \"usage: %s \n\", argv[0]);        return -1;    }    int N = atoi(argv[1]);    if (N<=0)    {        fprintf(stderr, \"%d must be > 0\n\", N);        return -1;    }     // define an array to hold the threads to be created    ???       workers[N];     // define a set of thread attributes for creating threads???           attr;    // define a variable later used for “for” loopint i;    // use dynamic memory management to create an array to hold the integers    a = ???                     ;    // seed the random number generator    srandom((unsigned)time(NULL));    // initialize the default thread attributes    ???    // use “for” loop to create the threads, where the index of the created thread in workers// array should be passed to the thread as the parameter    ???    // use “for” loop to wait for all the threads to exit    ???    // calculate the sum    int sum = 0;    for (i=0; i