accurate running time of each line and total running time for the following function

Question

Show the accurate running time of each line and total running time for the following function:

int f1(int n, int A[ ], int B[ ])
{
             
            if ( (n>=5) || (n<0) )
                        return 0;
 
            for (int i=0; i<=n; ++i) 
                {
                    A[I] = 0;
                    for (int  j=0;  j<i;  ++j) 
                            B[I] = A[I] + I;
                }
            return 0;          
}

What?