8 k:
Ss → d  k

![0_image_0.png](0_image_0.png)

f

![0_image_2.png](0_image_2.png)

d

![0_image_1.png](0_image_1.png)

I

![0_image_3.png](0_image_3.png)

p M

![0_image_4.png](0_image_4.png)

d

Tk

![0_image_5.png](0_image_5.png)

Pfd d Tk → d' r

![0_image_6.png](0_image_6.png)

