content_image/313428.jpg content_image/313427.jpg content_image/313429.jpg content_image/313430.jpg content_image/313431.jpg
for 

Then 

Now 

We are left therefore to find P − $^{1}$. We have PQ = I$_{D}$$_{−}$$_{1}$ for 

<img src='content_image/313428.jpg'>

<img src='content_image/313427.jpg'>

<img src='content_image/313429.jpg'>

<img src='content_image/313430.jpg'>

<img src='content_image/313431.jpg'>

