(i)  
1
0
0
0
1
0
0
0
1
(ii)
1
0
4
3
5
1
0
1
2
–
3 Using Cofactors of elements of second row, evaluate ∆ = 
5
3
8
2
0
1
1
2
3 4 Using Cofactors of elements of third column, evaluate ∆ = 
1
1
1
x
yz
y
zx
z
xy