how to recreate this image in Illustrator.
Hello everyone
I wish to recreate the following in Illustrator:

I tried to do it myself using 2 circles and a rectanble. and then using the 'Unite' command in Pathfinder to join the three elements, but i do not get the nice curves that are in the source file.

Can you please guide me how i can accomplish this. Disclaimer: my Illustrator skillset is of a basic level.
Regards