Question 1 0/2 pts The following code is supposed to solve Lx = z for x where L is a lower triangular matrix: for i-1:n s=0; for j 1:i-1 s = s - L(i,j)*x(j); end x(i) = s / LCi , i); end There is more than one bug. The code is correct There is a bug: the 6th line should be x(i)z()L(, There is a bug: the second line should be s z(i) There is a bug: the 3rd line should be for j - i+1:n There is a bug: the 4th line should be s = z (i) -L(i, j)*x(j)