I'm the only one speaking up in class

And by speaking up it's just to answer very basic questions that the professor asks us as a group, shout out the answer style, but all my classmates are so darn QUIET!!!!! They literally whisper or mumble the answer, and the professor doesn't hear them so she's still waiting, and will either give us the answer or someone (usually me) will finally say it loud enough. This is why I'll just say the answer right away because no one is loud enough.

I did a test this past class where for 10 back-to-back questions (honestly EASY questions, stuff we have gone over so many times) I kept my mouth shut, refused to answer, and the professor ended up giving us most of the answers. Then the next set of questions I just belted them out immediately because apparently no one else is gonna do it? It's so dumb, why is everyone so afraid to speak up? And it takes up more time when we just sit and wait, I'm just trying to move things along so we can learn other stuff.

I am kind of afraid that by answering all the questions I'm being annoying but maybe I don't care anymore, I'm here to learn and engage in the class. Seems like no one else wants to answer anyways.

Is this common nowadays in college? I'm going back to school, so last time I was in college was, yikes, almost ten years ago, but I feel like more people engaged? Maybe I'm remembering things differently.

for info I'm taking a beginnger German language class.