How to remove small arrows on blog slider?

Is there a way to remove a small arrow(s) that are located just on the right of the image preview on the blog slider?
Also is it possible somehow to change that navigation in the bottom, that all "dots" (current slide) are all circles?

LINK:

https://bit.ly/2PqnGQH

PREVIEW:
https://imgur.com/lmIh9bp

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