Images for LinkedIn ads for hard launch/Twitter and Facebook too

Need a couple images we can use on LinkedIn to accompany our sponsored posts. I'm open to image ideas.

SIZE: LinkedIn -
50 pixels wide by 50 pixels high.
800 pixels wide by 400 pixels high..
I put in the text for context but all I need is the image to use.

1)
TEXT: Red Hat Developers community is expanding. New materials weekly. New access to technologies. And new ways to contribute your ideas. Check it out.
IMAGE: big A building icon

2)
TEXT: We’ve loved developers for years and now we have a new community just for you. Red Hat Developers lets you learn more, code more and share more - faster.
IMAGE: Red Hat Developer image

3)
TEXT: Talking containers? Join a 20 minute live demo with Q&A with Red Hat Developers. Register now.
IMAGE: Do we have a containers icon that we could put a play type button over?

4)
TEXT: We’ve loved developers for years and now we have a new community just for you. Red Hat Developers lets you learn more, code more and share more - faster. Check out the site just for developers.
IMAGE: Red Hat Developer image

5)
TEXT: Considering microservices? Download the new O’Reilly book - compliments of Red Hat Developers - Modern Java EE Design Patterns.
IMAGE: Markus book with updated RHD logo

6)
TEXT: New results from a 2016 Developers Salary survey. See how you compare.
IMAGE: Need ideas here.