_{(i) We have,}

= × 2

=

(ii) We have,

= ×

=

(iii) We have,

= ×

=

(iv) We have,

2

=

= ×

=

(v) We have,

3

=

= ×

=

(vi) We have,

1

=

= ×

=

(vii) We have,

3 1

=

= ×

=

(viii) We have,

2 1

=

= ×

=