Q$1)$ Make the grades array.

Q$2)$ Using an ehanced for loop, add up the numbers in the last array $1,3,2,1,1.$

Q$3)$Do the same but with a traditional for loop.

Q$4)$ Write code to swap the $2$ arrays $[3,1,2]$ and $[1,7,2].$

Q$5)$ Using a traditional for loop, add up the first elements of each array $(3+4+1+1).$

Q$6)$ Do the same but with an enhanced for loop.

Q$7)$ Replace the array $[4,3]$ with the array $1,2,1.$

Q$8)$ Add up all the numbers in the $2$D array using traditional for loops.

Q$9)$ Add up all the numbers in the $2$D array using enhanced for loops.

Q$10)$ Make grades refer to this new $2D$ array $,\{1,1,1\},$ null