linux grep, stat, xargs instruction solution!

Symptom and background of the problem

When you first learn linux, you need to learn a list of all the files in a directory called private/(private/ and its subdirectories have many files) that contains the string "cat", and you need to display the file path and user name for each file; The file name and user name are separated by commas(,). The instruction requirement is to use only grep, stat, xargs commands to complete.

phenomenon and occurrence background, please write the first error message

Insert code with code block function, do not paste screenshot. Answer rate decreased by 50% without using code blocks

Running result and detailed error content

All kinds of mistakes.

My answer ideas and tried methods, and those who don't write their own ideas, the answer rate drops by 60%

My idea was to grep the specific string cat first, use stat to display all the files in the "private/" directory, and finally use xargs to standardize the format, but I'm not familiar with the use of these instructions, and the output several times is not the answer.

The result I want to achieve, if you need a quick answer, please try "paid reward"

need to output the result looks something like this: private/tmpazfaxca0 / tmpv4dfwkgl, games