Preparing for POLICE PHYSICAL TEST. Not able to complete 5km in 25 min. Any advice would be highly appreciated!

24 guy , 6ft , 80 kg. I am preparing for the Gujarat police physical test, which is starting on 8th January. I have been running on and off for the past three months due to my job and schedule. Initially, I couldn't even run 1 km in one go, but now I can run 6 km in 30-32 minutes quite comfortably. The requirement is to complete 5 km in 25 minutes, and I currently take 27–28 minutes. I have about 10–12 days left. I’m eating simple, healthy food, avoiding sugar, and running every morning. Is there anyone who can advise me on how to complete 5 km in 25 minutes within this short time? Or is it too late to improve this much? EDIT: Thank you so much Bhaio, I have made a note and articulated tips I got from here.. started running with the new confidence! Will update if I get through the test after 8th January!