I need help with this! BASH

Please post the commands need it not only he result

Thanks

3. Write a bash script to a. Read a file name with the pattern firstname lastname.usr and then read that file from the test_users directory and echo that user's information from the file.[get minimum of 2 user screen dumps] b. If the entered file name is not existing in the test users directory echo a message "file: does not exists". [Enter non existing file name and get a screen dump of the result]