Final answer:
The article implies that Glenn was a hardworking individual who excelled in various activities and academics, indicating he worked and studied hard.
Step-by-step explanation:
From the article, you can infer that Glenn worked and studied hard. Glenn's varied interests in activities such as soccer, playing the trumpet, and competing on the swim team, along with his academic success in math and science, indicate that he was a dedicated and hardworking student.
While he faced challenges in deciding his college major due to his broad range of interests, the encouragement from his teachers suggests that he was recognized for his diligent effort and commitment to his studies.