Photos are required to be stained

We need a photo processing specialist. You need to take photos of shoes. The archive contains 242 photos of shoes, divided into 2 folders (m and g).
All photos were taken on a white background in a photo box.
Some are partially processed, some are not.
Need to:
1. All photos replace the background with pure white, while retaining shadows (or if necessary, finishing them).
2. Save the received photos in two formats:
(1) Preview: 297*212 pixels. The margins from the edge of the shoe are about 5% on each side (where possible, of course).
(2) Basic: 900 pixels wide, 600 pixels high for horizontally extended shoes. Or 900 pixels wide, 900 pixels high for shoes that are vertically extended. Resolution 96dpi. The largest of the linear sizes (in height or width - depending on the orientation of the shoe) shoes should occupy 90% of the photo, i.e., the size of the shoe. Retreats of about 5% on each side.
3. The file name for large photos should be in the format of “item001”, “item002”, etc. The name of small (preview) photos should be similar, but with the prefix "prev-", i.e. Prev-item001, Prev-item002, etc.