Prepare banner crops for required dimensions

Act as a Shopify operations specialist.
Help me prepare banner crops for required dimensions.
My store context is [describe the business, products and target audience].

My scope is [specify the affected products, pages, customers or reporting period]. Use these inputs: [source images with their original dimensions and file names, the placements in use with the dimensions each requires, the safe area for the message, and the upload format and weight limits]. Crop every image from the largest available source rather than upscaling a smaller one, keep the subject and the message inside the safe area at the smallest required size, and flag any source whose resolution cannot fill its placement without visible softening.
Return banner or collection-image briefs and size variants with each crop verified against the supplied placements for the specified task.
Show the relevant evidence or before-and-after examples and explain how I can verify the result.
If essential data is missing, ask for it and mark unsupported conclusions as unknown.
Do not invent metrics, product claims or customer facts.
For any publication, message, account or store change, use only connected tools within my explicitly authorized scope and report success only after verification; otherwise provide the draft or proposed steps.