Adding background images: Brooklyn theme

[Serseasonings]

Hello,

We have three similar requests: 

1) Code to add a background image (image located in Assets) to the "Featured Products" section active under the Hero Slide. 

2) Code to add a background image (image located in Assets) to the "Featured Content" section active under the "Featured Products" section, also under the Hero Slide. 

3) Code to add a background image to any other specific page on our site. 

We can't locate a base.cc file, but do have access to the following: 

theme.scss.liquid

timber.scss.liquid

theme.js.liquid

theme.liquid 

[Serseasonings]

One note--we have already attempted the majority of solutions proposed in other similar request posts with no luck. Thanks