trying to reverse an array.can you find the problem?

Question

https://code.sololearn.com/ca6VOcXAasRp/#c

Answer 1

for(i=2;i>=0;i--)
{
printf("%d\n",ara[i]);

}

Answer 2

Modify the first for loop and use i <= j as a condition instead of i <= 2.

for(i = 0, j = 2; i <= j; i++, j--)

Answer 3

https://code.sololearn.com/c3okUgTHaTpL/#c