I need these solved with a matlab code. Thanks in advance

3. (20 pts) Using Gauss forward elimination, evaluate the determinant (which you can obtain after the forward elimination step). 35 2 41 1 1 -1 6 D 2 3 5 1 21 4 I 4. (30 pts) Using your codes in (1) to find x, y, and z for the system of equations below. Find the solution directly through Matlab functions and compare. How would you modify your GE algorithm to better solve this problem? x+y+z=1 x+1.000ly+2z = 2 x+2y+2= =1