$1.$ Implement void scale$($int N$,$ int arr$[],$ int scale$)$ in array.c

This function scales each element of the array arr $($of length N$)$ by scale $($that is$,$ multiplies the element by the value of scale$).$

$2.$ Implement void flatten$($int N$,$ int arr$[][$WIDTH$],$ int flat$[])$ in array.c

This flattens arr and stores it in flat. arr is an N by WIDTH $($a #defined variable$)$ array, and flat has length N$*$WIDTH An example: