replace pink image in about us page modules

I am trying to change the Sample module installed with Quark (About us - Our work [Bottom1])

At the moment it is pulling the image
background-image: url("images/demo/our_work_bg.jpg"); width: 100%; height: 130%; position: absolute; z-index: 0; top: -361.365px; background-size: cover;

This seems to be a inline style on the page itself - and not found in the CSS styles.
I cannot find it in the custom module code either.

Where/How would I reference a different image in a different folder in images?

The same would apply to the quote module on this page....

div class="parallax-bg-layer" style="background-image: url("images/demo/quote_bg.jpg

Hi, you can just replace images with yours
or use full image url... as you want.

Quark has 3 styles, about which one we are talking about?
Just show me on our demo or on your site.

On the DEMO template > the page "Our Team" > Module - "OUR WORK IN NUMBERS"

Rather than replace your demo pink image in the images folder (images/demo/our_work_bg.jpg)
I would like to reference a different image in a different folder - this will give better SEO.

this image was added using a simple method (every Joomla kid should knew that)

OK, this answers the question.

Thank you for the help, much appreciated