Is consent voluntary under the Fourth Amendment where a driving under the influence arrestee submits to a blood draw after the arresting officer tells him or her that he or she is required to submit to a blood or breath test to determine blood alcohol content?

Is a blood draw reasonable under the Fourth Amendment search incident to arrest exception, where a driving under the influence arrestee submits to a blood draw after a law enforcement officer tell him or her that he or she is "required" to provide a blood or breath test to determine blood alcohol content?

Is consent voluntary under the Fourth Amendment where a driving under the influence arrestee submits to a blood draw after the arresting officer tells him or her that he or she is required to submit to a blood or breath test to determine blood alcohol content?