$1.[1$ POINT$]$ In the main thread, declare a list of $2$ million numbers and initialize it with random numbers between $-5$ and $20$

$2.[1$ POINT$]$ Divide the list into ten sublists.

$3.[1$ POINT$]$ Define a function named sum$\_$of$\_$squres to calculate the sum of squares of a list.

$4.[5$ POINTS$]$ Create ten child threads so that each of them is responsible to find the sum$\_$of$\_$squres for each sublist.

$5.[1$ POINT$]$ The main thread should then sum all the returned results from the child threads to get the final result.

$6.[1$ POINT$]$ The main thread should then reinitialize the original list with new random numbers and repeat the whole process for $100$ times.

$7.[6$ POINTS$]$ Use barriers to synchronize the work between the main thread and the child threads.