Question -
Answer -
(i) 
(iii) 
(ii) 
(iv) 
Solution
(i) Let
It can be observed thatin the second row, two entries are zero. Thus, we expand along the second rowfor easier calculation.
(ii) Let
By expanding along thefirst row, we have:
(iii) Let
By expanding along thefirst row, we have:
(iv) Let
By expanding along thefirst column, we have:
