The post is still active for another 4 hours.

You have completed Task-2(Beginner[Fixed]), but you do not know the General Voting Window??

if you are voting after 6 Days 12 hrs age of a post, then your voting worth starts depleting at a linear rate with 0% depletion at 6 days 12 hrs and 100% depletion at 7 days the age of a post. Here the upvote worth depletes if you vote beyond 6 days 12 hrs age of a post.