How should a developer reference a third-party JavaScript library from a Lightning component?

A developer creates a Lightning web component to allow a Contact to be quickly entered- However, error messages are not displayed.

Which component should the developer add to the form to display error messages?

A comply his reference data stored m multiple custom metadata records that represent del auh information and delete behavior for certain geographic regions.
When a contact is inserted, the default information should be set on the contact from the custom metadata records based on the contact's address information. Additionally, if a user attempts to delete a contact that belongs to a flagged region, the user must get an error message.
Depending on company personnel resources, what are two ways to
automate this?
Choose 2 answers

A developer notices the execution of all the test methods in a class takes a long time to run, due to the initial setup of ail the test data that is needed to perform the tests.
What should the developer do to speed up test execution?

A developer is working on a set of custom Aura components that can be Individually added to a home page. One of the components, c:searchAccounts, allows users to search for an Account and then select a specific found Account. Once selected, the other components.
Should get other information related to the selected Account and display it Which event should the c: 2eazchRccounta component fire to make it known that an Account is selected?