(Java) Algorithm complexity

(a)

System.out.println("a");

j = 1;

while(j<=n*n*n){

for(i=1;i<= n;i *= 2){

System.out.println(i);

}

j++;

}

Time = ? (Hint: how many iteration?)

Big O notation?

(b)

for(i=1;i<= 600;i++){

for(k=1;k<= n ; k++){

System.out.println(i*k);

}

}

for(i = 1;i<= n;i++){

System.out.println(i*50);

}

Time = ?

Big O notation?