discrete-time system

Ok so I am required to develop proportional controller from a given continuous transfer function, however first I have been asked to find the discrete-time system transfer function. From my understanding this requires the z-transform to be taken from the continuous transfer function G(s)...

Hi, I have the following zero-pole map I created of my discrete system (see attached picture) but I want to make the poles closer to the origin. Is there any matlab command or another way in which this can be accomplished ? Thanks in advance.