How to remove a container disk and reclaim the space onto my main partition? I purchased a secondhand iMac in which the previous owner manually deleted his data instead of just restoring to factory settings. It was rough getting it started but we got there in the end. The only thing left is this: he originally had a bootcamp partition on his hard drive, but when he deleted his data it left behind an empty container with 150.85 GB in it. I want to use Bootcamp to create a Windows partition on my hard drive, but it just wants to create a new partition, and I would rather just get rid of this container and then use Bootcamp to do it properly. I'm running Catalina 10.15.6 - How do I do this?
Here's the diskutil list

Here's my disk utility

Here's the container

I found a similar post that gave Terminal commands, and that would be fine - I just couldn't figure out how to adjust it to fit my situation. Other instructions are fine, too, I just want this container gone.
Thank you in advance!
Choose Partition from the toolbar and confirm you wish to partition if prompted.
Select the container you wish to remove from the pie chart, then click the minus button at the bottom to remove it.
Adjust the handles on the pie chart segments to expand the previous container into the space left by removing the other container (if this doesn't occur automatically).