How to Edit/Add Contact Record for Julia Chavez
If you already created a contact record you intended so be for "Julia Chavez", then you may just need to edit it to fix spelling or correct/add field values for Email and/or Mobile. Othersise, if you never created a contact record for her, you can add a new one for her now.
Use the App Launcher to pick the Marketing app and click on the Contacts tab
If you see Julia Chavez or a name you intended to be Julia Chavez listed there, then click on it
Or if you don't see her listed there, you can change the list view (upper left - probably says Recently Viewed), set it to All Contacts, and then check through the full list & if you see Julia Chavez or one you intended to be Julia Chavez, click on it
If you still never found a contact intended to be Julia Chavez you can add her now by clicking on New on the upper right to create a new contact and fill in the First Name, Last Name, Email and/or Mobile fields to be "Julia", "Chavez", "firstname.lastname@example.org" and "(510) 403-8995", respectively and then click Save
Or if you did find and open the one you intended to be Julia Chavez, then click on the Details tab toward the left, a little below her name, to see all the fields and then click the tiny pencil icon on the right side of the field to edit/fill in each one that needs fixing to match the values shown in the previous step above and be sure to click Save when you're done
Re-grade by using the App Launcher to open the Grader App and follow instructions to run the scoring routine again and then be sure to reload the page to see the updated error list and grade certificate