Updating laser puzzle game in unity with 2 triggers and doing the controls and fix the gravity as well

Hello, I need some help making adjustments to my group laser puzzle game . I need help with 3 things to fix my group laser puzzle game for now. The gravity for falling is still broken and I need help with fixing it. I have tried multiple times and I need help to fix it. when the player falls from the scene the object is currently floating up into the clouds instead of just staying there which causes the scene to break. The objects needs to stay in place and not float at all for when the player falls from the scene / level say level 2 or 3 it will lead to their death since they will perish and have to start over.
The other things I need help with is finishing the trigger animation for the gun and the pushing animation for the button. It supposed to be the fps animations which means first person shooter animations. You see the trigger animation for the gun is almost complete all that is needed to complete it 2 is to add an animator controller and you need to reference it in the script in order to do the controls for the gun.
Then when it comes to the pushing animation for the button the trigger needs to be done for that and so does the animator controller and make certain to reference it to do the script for the controls for the laser switch button as well. The model for the laser switch which does look like a button is already in the file as well. Make sure to download this version of unity it is required for my courses and make certain your computer can download this version of unity it is required for me to use for my courses. https://unity3d.com/unity/whats-new/2019.4.30
and also this is extremely important to remember to keep me updated with your progress as well since I need it for it to be completed by today by 5:30pm or sooner. I will give you the link to my group game as well with google drive.
https://drive.google.com/file/d/1WlLK0-MdR6z4rHRL7…
and also make certain to explain to me how to work the controls for both as well. and you can also chat to me on discord app as well that way you can help me finish with setting up the game on my end in the event that I am having any issues with the files or updating the game after you are finish doing the triggers and controls and you can help me out from there as well .
I am slightly short on money since back on Saturday my friend needed a place to stay for the night and we combined our money for her to get a hotel for the night otherwise she would have been sleeping in her car while it was pouring rain.
Also if you do not know what to do do not bid on this question at all it is that simple there is no time for excuses embrace solutions.