Help Time and space Complexity

Pa help naman po sa formula and answer

1. int sum(int x, int y, int z)
{
int ans = x + y + z;
return ans;
}
2. int sum(int v[ ], int n)
{
int r = 0;
for (int i = 0; i < n; ++i)
{
r += v;
}
return r;
}