Which two of the following tasks would most likely be completed by a biomedical
engineer?

train hospital staff on how to use new machinery.

design an artificial lung that could be implanted in humans.

interview the governor of your city about an important issue.

operate audio-visual equipment for a large corporate event

construct skyscrapers with the assistance of various contractors.

Explanation:

A biomedical engineer (BME) is the application of engineering to biology and medicine for healthcare. It consist in designing and problem solving to healthcare improvements, that includes machines or even artificial organs designs. Also, a biomedical engineer has the scientific knowledge to advice and manage medical equipments in hospitals and ensure its functioning with the internal standards.

So, basically this is an interdisciplinary career which mix engineering, biology and medicine, becoming a powerful area of study to healthcare, where research and development are main things. That's why the two correct answers the first and second one, because they are about designing new material and managing equipments.