How do you set the custom block MyCompany\MyModule\Block\A as a child for the block named product.info using layout XML?

You are debugging a problem resulting from a recently deployed around plugin. The plugin is intercepting the doSomething method. The aroundDoSomething plugin method is called successfully, but the original doSomething method is no longer being executed as expected.
What is causing this?

The module MyCompany_MyModule provides custom admin interface pages.
Access to these pages should only be granted to specific users.
You add the required configuration to the module's acl.xml file, but the setting does not seem to work as expected.
How do you visually check if Magento evaluates your ACL resource as expected?

You have been asked to display details from the customer's latest order on the customer's account dashboard
(customer/account/). You create a new custom template to show the information.
How do you obtain an order repository so you can fetch an order?

How can you access the select query of a collection?