In a React Native application using useForm from react-hook-form, how can you implement a validation pattern for a form field to ensure it meets specific criteria, such as a valid email format? Choose the best way.

How can you manually create a validation error on a form element using react-hook-form? Select all applicable options.

In the provided React Native code using react-hook-form, first validation is triggered only when the submit button is pressed. How can we trigger the validation when input focus is lost. Select all possible options that work correctly.