You'll need a helper variable for this, so depending on your programming language, the solution becomes:
int helper;
helper = arr[i];
arr[i] = arr[j];
arr[j] = helper;
Answer:
it would be nice if you gave some form of info here
Explanation:
in other words without information no help aka I'm slow and just need points
Answer: A; X coefficient
Explanation: Hope I helped out !
-Carrie
Ps. it would mean a lot if you marked brainliest